... c) s = 0,51m. 1 .25 :15=rad/s 2 ; 24 0 vũng. 1 .26 : 22 m. 1 .27 :b)70,7s c) 25 00m; d) at = 7m/s 2 , an = 7,14m/s 2 , R = 35000m. 1 .29 : 2 2 2 1 22 11vvvvt++=; 2 2 2 1 122 1minvv|vv|d+=. ... U2mgdq =. 10.13: U = 20 V. 10.14: cm1 ,2) 2s(U4Usxo=+=. 10.15: 2 2odU2U. Chng 12 : 12. 1 : a) )ba2ba(Sba)ba(R 22 22 +++++= ; b) Sa.)ba2ba)(ba()baba(bba)ba(R 22 22 22 ++++++++++=; ... mv03cos.sin 2 . 2. 25: 2, 7.1040 kgm 2 /s 2. 26: ; tb2M=b/at =; M = 2 ab. 2. 27: 340 2 0rRmT=; 2 00rR=. 2. 28: . 2. 30: = pxrL'L0g)mm)((F 21 21max+à+à=. 2. 31:...