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giao an vat li 10CB HK1

71 507 2
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                      ! " # $  %&! "    '#(  )('                                          !    "     #  "   #  "$      "   %#  "    "        &"       "  '  "  (              )       "    #  "  "     "  "*  "+*  &$         "             "   '( " *  ' , -#      ".     !  "  "     )       "      "    ."  $#   '+ " )  )  ,+      )' ' " ,  -  . /'$  0  '    ,+  )( "   1   ,+  )( "   ) +  ( 23 43 /0  "    "  " #  "       1 /0#   !     / #  "   $       1'#      (   !  1 /2#"3!     "      " #  "     "  '   !  )       "      """  "  -0  %4-5("  " "   3    "$      "    "  *#  - !           #"     .            /2    " #  "       $    "#"  1 /      "         !       "  #  "         $    "#"                $   #"   1 /      3  "  -6 /"       "    #"  "  #"      "   "  )    #  +  +"#"       "      "#"         "        "    #"    7        $              /-  3  ""  !     #  "                     #"  1 /2    #       " '#.("  "  "  "      "      ) /      3  "  -8 /0  "    )       "      " #  ""        1 /-    468 #  "    $   $    9"  95       $     !           "3  $  $     ,+      5  0  " (  6      0 )( " ,+  )7), " 078( 9 ,   /-  "+  !       " #  "     ' #  "(     /4."  $#   !   /4:  +  "                  -   !   /  3.  "  $  #       /-  #."  $  '!          :,2( /     !  "3.       "# /4.  "  "3#-6 /4."                         ,+   :5  0 " ()  );  ) ,   1   <5   )( "   1    <  6+  /;#  "!    )       "      ""            "#"   "           /4.  :,2 /4."  $  "3         ' #  "  "  $  #"    " #  "            "     *    !   .( /4."  $   '(=,+  )', " 0' '( " ,+  )'  -      " #  "'  "*"$      ($  .  "     "      #  "     .          #  "     "3"   /', " 0' 5  " #  "       $    "#"    "          #"     .         !         '*    .               "#  +( :'>( 9 ,  ' #  +  +"#"       "      " #"      "    "   #"  7         $             '  );  ),  1  <5  )( " 1   <6+' '?  -  00+)1    ),'    "  '    (    # 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 " $  "  F  "  /4  "      +3  +)       "     #  "4  +3  +   )      "           )            "                 #  "  *    "     "    "   "  #"   '    )  ;  )  ,         <)( " ,+  ' '#+)  1  ,++'    5"  '*  "   ($  "      "*"# "  7  "  "   "  "  *  "  /'  , " 01    ' ?'  8()('  4I- #  "$    "    "  F A3   ,+  4( " )+ 7B    /, "  $    !      *    "$        "    F"  -             4I-      47F"    "   8 /;  $    "#  +    +#     #      "+"3'$  "       ( ?'C(  6  0'            /$  /%&! "   D " !  % '#(  )('                    "*    ;#  !    "  "         +"              "#  +      ,        "         "*        !    ;3      "  "    K"         "*      "  ""#  +"""    "   #    "      "*    ""  "    *  ++   '( " *  ' 4   3  888>"#  $   5  ".    "#  +       "*     '+ " )  )  ,+      )' 'E " 0<*  )( 9 'F:3G -#  "  $    1  )       "      """  "  $  1 %#  "  "           1 /'$  0  '    ,+  )( "   1   ,+  )( "   ) +  ( DL /  ;#    "  "               ""  1-"   "   #  ""  17   1   ,+  -  6    01 1    + )  <(  *5    )( "   )( "  ,+  ' /4.  $  "      "  $   > 6EL 6ML /N  $  +O"       " "     #  "          "3 '/(    "   "       "  '/(   "     "    . /2              #     $     #  ""  "!  "   "   #  "  "     $      "       .      #    " "   /-  ""  $    0O !          1"   "1 /    . $      3  "   "     "      "  "            "      1#   )3  ""    1 /-        )3" "F      "  "# "  "    "  "  "  "                        "          $         "  ."    "       /;#        $    1 /"  $      "*   1 /-      "       +    "   "    "    $         1;  !         # /I              !  "1 /, "  $           "*   <-    "*  $             $    "*  F   "  "  "        /    "*        ".  !  "#  "  "       /-   !        "*   1 /I             "*    *      1 /;#  8    "*       "         ""  .3         ) /-  3"    :,2  "     +"        "*   "1 /-  3   "+"       #"   <46-    )#"+  ""     "    ') M JM(,"   '"  J  M(  $   $    #"      *"  #                  #      /-    "3!     !#  $  3       "  "    /        '   )3  )P3$$  $*  "    "                +(  ,  $                 .       "*'"     "  ( /  4.  "      "    "     "   #  )3  " /-"  "  A     = '6(   ,+  /5  0 " (6    0 )( " ,+  B " ,(1  8( 9  ,  , ,  ) )( " )( " ,+   B " ,(' /-    $*3""  "  $  #   /4..  "  $  '     "*  ( /0    "  $    #       <-    "*  $         "     <-    "*  $         "    "*      "      /,#       /     !   /  '6(.        = = /            "*           ."  $  "#     "      "     ,+    :  5  0   " (  . <5  )( " ,+  1  ,+    ,+  H  )( " )( " ,+B "  ,(' /  :,2      )# !  +"      "*   M M      = + = + '8( /4."   $#       "      #      '( " ,+  B " ,(' '+),+  <(*5   = Quãngđườngđiđược Tốcđộtrungbình Thờigianchuyểnđộng     = 7   Q.*  QC /'( " ,+  B " ,('   -        "*      $            $     "*  F  "  "   "       :'>( 9 ,  ,,  )< )( " ,+  B " ,('         = =      "*         ."  $  "#     "      " '<5  )( " ,+  1  ,+        ,+   H       )( "  )( " ,+  B " ,(' '    <5    )( "   ,+   B " ,(' M M       = + = + /'+     ,+  H  )( "  )( " ,+  B " ,(' ? 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"   D " $!   " !  % '#(  )('    ;  "  "          3     3"  ! #  "  "  "               $   #  "$  ""               "*        !#    #  !#     ;  "  "  "   #  "   3      "   #  "  K"  "    "*  !#        #  !#     ;  "  "  "       *       +       $    "  "     "*  !#    #  !#     ;  "  "  "           +"      "    "*   !#    #  !#        ,      "           "*         '( " *  ' A  '6  !    66        66    #  #( '  <5   "   ' ' " ,   /'E " 0<*  )( 9 'F@3G ;  ""  "           +"            "*    1 :'$  0  '    ,+  )( "   1   ,+  )( "   ) +  ( 6L OL / 2  )3  "        "*     "   #  ""    "   "  ".3  "   #  " "      !  !    #"     "      "     "  )3       #  ""     +          "*     ';B  )3$*"*  " +*  (;#  $  "    "      $         1 #  "  "    )     $    1,  "    ""   1 /5 #  "+  !       #  ""  "  1;#   #  " "   "  $    1 /5  " #  "    "*         " "        5     )3     #  "  "+  $    1 /  .+  )3  "     #  " "  "  #"* t∆ 1 -  "    +!  "      "     ,+  + " )  )5  (+   )  .' /-    $*3.    ,+  /5  0 " (6    0 1    +)    )    '  ( "   ,+   B " *,+ " ,(' /  :,2  "  $   <  "  #"* t ∆   "  $    5)3!      "      s∆ $   /"   #  ""         "  !  "  "   #    "  "          "*   '?  +)  )  '( " ,+   B " *,+ " ,(' '+  -  )( " 1  +)  )  ' s v t ∆ = ∆ '6(  $    $     #   ""  "     #  ""    "   <  -  "  "  "           #  "     #   /'?I)1  +)  )  ' ;3" #  ""  "    6 #  " "    "  $    " 3"   "   #  "                      !  "  $        $    ;"3  ""  )        :' ( "  ,+   B "  *  ,+ "  ,(' R 6ML #  "1 / ;#  "  "   "     "   * "    1S        1 /;#  ""  "    +  "          !    "    1 /-  3  "  -6 <,      "  "  "       )3  "6 /-  3    8:,2 ""  .   #  ""  "  $    "  $   3"1 /,#       3" #  " "  "   /-  3  "  -8 / -  "       *                 "*     "  ""  #"       $           $           #  "$   -  "  "  "     *   #  ""   "      "      "          /     $      "*     1 <I          17  $      #  ""  "  "  "   "  "      1 / -   "   +#         "*     "    !         1 /, "  $           "*     H-        !" #        $      % # &  %  ' # " (    !     /         $*"   0#.$    "   #   ""  "  "    "  #"  "    /-  3  #  )3  "    "  "     /-  "  $   #  ""  "  "         "  "1 /  ,   "       $  "*  "    "       /7  "  "  #"#         "*  "     "!       #  " /7          "*     "    !         #   "       "   "    #"     #        1 / ;#        "         "          $  ";#  "   "   "   1'"    $#     ( /-      3"  "  .     "*   #  ""  "   #"    s v t ∆ = ∆  '6(  $    $     #   ""  "     #  ""    "   <-"""       #  "     #   /-  +  "   /-  #  "  -6 /4.  :,2"  $  #       /-  #.$  -8 /  :,2  "  $    #       / -  "  +#     "*           "           "*      !#            "*  #  !#     ,+    :    )  (  6     0    +)  <  )( "   ,+   B " ,(' /I.  ", "  $   "   /   "   #  "  "  "   "  "    "   /;#  ""  "  $"* /2   /2&;   #  "$"   / 4. "    $#       )#  !       "    " /           "*         $     #  ""  "   *  "**    "3 "   /-        $     #   ""  "  "*"3"       $           "*     !# /-        $     #   "  "    "          "3  "         $           "*   #  !# H-        !" #        $      % # &  %  '  # "(    !     '( " ,+  B "  ,(' '    +)  <  )( "   ,+   B " ,(' 'E    0+)  v a t ∆ = ∆  '8( ,"       $    $  )    * " .     "   #   "         "      #    " " 0 v v v∆ = −      "  '"*( #  ""  "   t ∆ ' 0 t t t∆ = − ( /,"    " #   ""#  "3 "  -     $  Q. 8  *'?I)+)' ;   #  "$    $   3" "  $    $   3" 0 0 v v v a t t t − ∆ = = − ∆ r r r r D EL DL /  .  $    $           $  "               *   /;#    "    ""   1    +  "       "1-"       1'"   $#  ( /'  $#  (B       "   "  ""$    $       $   3"1;  .1 /$    $   3""  +     "  1'  "  $  "    !#( / ;#     "     3"" "1 /T  ""     "*  "  "    $  * 1'         "   #  ""1( /-  "!       "  "   )#!  "  "   #   ""     "*   !# /  $#    )#!  "   #    "  "          "*   !# /;#    "  "    ! #   ""  "    -7B7* "      1  -  !      "   1 /-  ".      "  "    "  1 /"    "    3    "   3   "    !.   "   #  ""  "  "3"   U  "  -> /4  ""  "  "   "    1 /7   -7B7     $   #   "  "*    "3  "         "    "   "  "  "   0 2 tb v v v + = /2"  +   "   #  "   3     "   "        "    "                 " -7B7 /  3  "  -?E 0 v v v∆ = −      "  '"*( #  " 0 t t t∆ = −   "   0 0 v vv t t t −∆ = ∆ − /2  :,2"#  +"   "  $#   ;#    v a t ∆ = ∆  '8( ,  "         $    $  )     *".     "   #  "     "   #  " "-     $  Q. 8  / 0    ;    " +  "       #    "      "  $      $   3" /;   V M    v ∆ r    +       v r   0 v r   ;3"  a r    +    v∆ r      +        3"  #    " 0 v r  v r  0 v r  a r  v r 0 0 v v v a t t t − ∆ = = − ∆ r r r r '8L( /4:"  $#  "  $       ,+    @    )  (  6     0 1  + )< )( " ,+   B " ,(' /0   <    "  " 0 0 v v v a t t t − ∆ = = ∆ − 'H( <$#"    "    " M '" M JM( t t ∆ = <   'H( 0 v v a t − = . 0 v v at = +  '>(    $    "   "   #  "-"" #  "   #  "    "       /:  !    "  "      "  " $   #  ""    $  "   /  3  "  ->   ,+  4J  )+  ) 5  8( 9 ,  ,<K 1  0+8(  7171 2 7 tb s v t =  0 v r  v r  0 v r  a r  v r 2 #  "-7B7 3""     #  "      +   "     +       3" #  "     !  "  $        $    ""3  ""  )        /'?  +))( " K' '+  )5  1  +)'     "  " 0 0 v v v a t t t − ∆ = = ∆ − 'H( <$#"    "     " M '" M JM( t t ∆ = <   'H( 0 v v a t − = . 0 v v at = +  '>(  $  "   "   #  " -"" #  "     #  "         "            *'+  1  +)H  ' :'+  )5  8( 9 ,  , ,  ))( " K'      "    "    "     "         "*   tb s v t = 7   -7B7     $   #   "  "*   "3  "          "             "  "  "  "   0 2 tb v v v + = M $   #  "#& $   #  "    0 v v at = + O /-  3"  "       " #  "          W    "  8  "  '8(F'?(X 0 2 tb v v v + = 0 v v at = + :  2 0 1 2 s v t at = +  '?(  $  "  "           -7B7 /  3  "  -?E /4."  "     CCCC 2 2 0 2v v as − = 'E( : 2 0 1 2 s v t at = + '?(  $    "    "                 -7B7 @'+  )-   9 + )7 1    + )7  8( 9   ,    ,  ,  ) )( " K'   '>(   '?(". 2 2 0 2v v as − = 'E( EL   ,+  ( " )+7B    ' /;""   #  ""  "     #  "    "  6  "    1;3";"  6  "     "*    )    "  1 /-"          "*    1-7B71 /;""  "   #  ""               "-7B71 /;  $  A   #    "++#  $       ?'C(  6  0'                @ $  :%&! "   D " $!   " !  %FG '  <5   "   ' ' " ,  -  . /'E " 0<*  )( 9 F43G -"          "*    1-7B71 ;""  "   #  ""               "-7B71 -   3"""    "*  !#"        3" #  "1 Y :'$  0  FG    ,+  )( "   1   ,+  )( "   ) +  ( 6ML 6EL 6ML /"      "*     3    :,2"     $#  +    %             -7B7 /-      "  #" "    "                 -7B7   +"    "     " /-  ")3  ""+!  "  8       "*      $      "*  #  !# '-7-B7( /+#    3"        ""  "      "*  !# /-     3"""     #!#"         3" # 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 " /0    "*  )) /,".3    !#    M     ,+    :    )  (    )   0  0+    )( "   ,+    B "  ,( /    #.  "  +    /-  ) M JM    M JM /7    '!  "  (&    "        "         /7   ""#  +.$    "  "   /-  #.  "      2 0 1 2 s v t at = +   "  $    +$   !  *  $   0 v v at = + 0 0 3 30 ( ) 0,1 v v t s a − − ⇒ = = = − ,  "                J M6Q. 8 I      )3   2 3 0 1 1 3.30 0,1.(30) 2 2 s v t at = + = + 4'<5  )( " ,+  )( "  )( "   ,+    B "      ,(' 0 v r '<( 9)  5'" M (.5'"() ) -#"      5  )#"  +  "  "     "     "    ) M "  "*   9)    "*  !#     #  "# M        ""  "        . "  "$  )J) M <. 5   "  "          "-7B7 2 0 1 2 s v t at= + : 2 0 0 1 2 x x v t at = + + 'R( '( " ,+  B " )  0 ,(' '+ ))( " )( " ,+  B "  )  0,('      0 0 v v v a t t t − ∆ = = ∆ −  0 0 v v v a t t t − ∆ = = − ∆ r r r r  0 v r  a r  0 v r  v r  v ∆ r ;3""       "*  #  !#      3" #  " /'?  +))( " )( " ,+  B "  )  0,('        0 v v at = +     !#    M        :'+  )5  8( 9 ,  , ,  )1  .<5  )( "  ,+  )( " )( " ,+  B "  )  0,('             2 0 1 2 s v t at = +  !  "#   2 0 0 1 2 x x v t at = + + EL   ,+  ( " )+7B    ' 6M [...]... và nêu tớ m tắ t t = 4s; vkk = 330m/s; g = 9,8m/s2 s=? Gơ ̣i t1 là thời gian mà hòn đá đi từ miê ̣ng han đế n đáy Ta có: s= 1 2 2s gt suy ra: t1 = g 2 t2 là thời gian mà âm thanh từ đáy vang lên s Ta có: s = v.t → t2 = v Mà t1 + t2 = 4(s) 1 2 2s gt suy ra: t1 = g 2 t2 là thời gian mà âm thanh từ đáy vang lên Ta có: s = v.t → t2 = s v Mà t1 + t2 = 4(s) Suy ra: 2s s 2s s + =4⇔... tính quang đường đi ̃ đươ ̣c trong chủ n đơ ̣ng thẳng nhanh (châ ̣m) dầ n đề u (gia tớ c như thế nào với vâ ̣n tớ c)? Đờ thi ̣ vâ ̣n tớ c – thời gian trong chủ n đơ ̣ng thẳ ng nhanh (châ ̣m) dầ n đề u có gì khác nhau? - Mớ i li n hê ̣ giữa gia tớ c, vâ ̣n tớ c, quang đường đi đươ ̣c trong ̃ CĐTNDĐ như thế nào? - Phương trình chủ n đơ ̣ng trong chủ n đơ ̣ng thẳ ng nhanh (châ... ̣ng đó là nhà vâ ̣t lý Gali-lê - Các em nghiên cứu SGK phầ n 1 rờ i sau đó mơ tả la ̣i TN lich sử của ̣ Ga -li- lê - Chú ý: Vì sao viên bi khơng lăn đế n đơ ̣ cao ban đầ u? + Khi giảm h2 thì đoa ̣n đường đi đươ ̣c của viên bi se ̃ như thế nào? + Nế u đă ̣t máng 2 nằ m ngang, quang ̃ đường hòn bi lăn đươ ̣c sẽ như thế nào? + Nế u máng 2 nằ m ngang và khơng có ma sát thì... tác chính xác với bơ ̣ TN để đo đươ ̣c thời gian rơi t của mơ ̣t vâ ̣t trên những quang đường khác ̃ nhau Vẽ đươ ̣c đờ thi ̣mơ tả sự thay đở i vâ ̣n tớ c rơi của vâ ̣t theo thời gian t, và quang đường đi s theo thời gian ̃ t2 Từ đó rút ra kế t l ̣n về tính chấ t của chủ n đơ ̣ng rơi tự do là chủ n đơ ̣ng thẳ ng nhanh dầ n đề u Vâ ̣n du ̣ng cơng thức tính đươ ̣c... phép đo trực tiế p Phép xác đinh 1 điạ lươ ̣ng vâ ̣t li ̣ thơng qua 1 cơng thức li n hê ̣ với các đa ̣i lươ ̣ng đo trực tiế p, go ̣i là phép đo gián tiế p 2 Đơn vi đo ̣ Hoa ̣t đơ ̣ng 1: Ơn la ̣i kiế n thưc có ́ li n quan và đă ̣t vấ n đề bài ho ̣c - Hs chú ý trả lời các câu hỏi của GV - Phép đo 1 đa ̣i lươ ̣ng vâ ̣t li là phép so sánh nó với đa ̣i lươ ̣ng cùng loa... ̣n tớ c: v = gt - Chủ n đơ ̣ng của viên bi ̣ khơng phải là chủ n đơ ̣ng thẳ ng đề u Vì trong cùng 1 khoảng thời gian mà quang đường đi đươ ̣c của nó khác ̃ nhau - Đó là chủn đơng TNDĐ Vì quang ̣ ̃ đường đi đươ ̣c của viên bi trong những ̣ khoang thời gian bằng nhau là khac ̉ ́ nhau (tăng dần) Hoa ̣t đơ ̣ng 3: Tim hiể u các cơng ̀ thưc tính vâ ̣n tớ c, quãng đường đi... nhóm hs: - Đờ ng hờ đo thời gian hiê ̣n sớ ; hơ ̣p cơng tắ c ngắ t điê ̣n 1 chiề u cấ p cho nam châm điê ̣n và bơ ̣ đế m thời gian - Nam châm điên N; cở ng quang điên E; tru ̣ bằ ng sắ t làm vâṭ rơi tự do; qủa do ̣i; giá đỡ thẳ ng đứng có vit điều ̣ ̣ ́ chinh thăng bằ ng; mơ ̣t chiêc khăn bơng nhỏ; giấ y kẻ ơ li; kẻ sẵn bảng ghi sớ li u theo mẫu trong bài ̣ ̣ ̉ III... lên cao ̣ ̣ ́ ̀ C Xe đa ̣p đang đi trên đoa ̣n đường thẳ ng nằ m ngang D Mơ ̣t cái pittơng chủ n đơ ̣ng trong xi lanh 2 Điều khẳ ng đinh nào dưới đây chỉ đúng cho chủn đơ ̣ng thẳ ng nhanh dầ n đều? ̣ A Gia tớ c của chủ n đơ ̣ng khơng đở i B Chủn đơng có vectơ gia tớc khơng đởi ̣ C Vâ ̣n tớ c của chủ n đơ ̣ng là mơ ̣t hàm bâ ̣c nhấ t của thời gian D Vâ ̣n tớ c của chủ... trước đă ̣t nằ m ngang (cùng khớ i lươ ̣ng) - Qua 4 TN cac em hay TL rời cho biết: ̃ ́ + Trong TN nào vâ ̣t nă ̣ng rơi nhanh - Thảo l ̣n nhóm hơn vâ ̣t nhe ̣ ? + Trong TN nào vâ ̣t nhe ̣ rơi nhanh + TN 1 hơn vâ ̣t nă ̣ng? + Trong TN nào 2 vâ ̣t nă ̣ng như nhau + TN 4 la ̣i rơi nhanh châ ̣m khác nhau? + Trong TN nào 2 vâ ̣t nă ̣ng, nhe ̣ + TN 3 khác nhau la ̣i rơi nhanh như nhau? - Vâ ̣y... góc, chu ki, tầ n sớ ̀ - Hs đo ̣c SGK & quan sát hình 5.4 - Lắ ng nghe để thấ y sự cầ n thiế t phải đưa ra khái niê ̣m tớ c đơ ̣ góc - Đưa ra biể u thức tính tớ c đơ ̣ góc - Tớ c đơ ̣ góc cho biế t góc mà bán kính OM quét đươ ̣c trong 1 đơn vi ̣ thời gian - Trong thời gian ∆t quay đươ ̣c 1góc ∆α - Trong mơ ̣t đơn vi ̣ thời gian quay đươ ̣c mơ ̣t góc ω - Vâ ̣y: ω= ∆α ∆t . '+),+  <(*5   = Quãngđườngđiđược Tốcđộtrungbình Thờigianchuyểnđộng     = 7   Q.*  QC /'( " ,+. " ,+  <   Tốc độ TB Độ dài cung tròn mà vật đi được Thời gian chuyển động = :'( " ,+  <  ,( - 

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