II HirdNG DAN QUAN Li, suf DUNG Sir DUNG PHAN MEM WORKING MODEL THIET KE THI NGHIEM PHAN CO HOC TS Nguyen Dinh Hung Trudng cao ddng Hdi Duang ThS Mai Ngoc Anh Trudng DHHdng Due 1 Tao chuyen dong deu,[.]
II HirdNG DAN QUAN Li, suf DUNG Sir DUNG PHAN MEM WORKING MODEL THIET KE THI NGHIEM PHAN CO HOC TS Nguyen Dinh Hung - Trudng cao ddng Hdi Duang ThS Mai Ngoc Anh - Trudng DHHdng Due Tao chuyen dong deu, bien doi deu a) Tqo chuyen dpng thdng deu theo phuo'ng ngang Md Working model Tren cong cu ciia Working model, kich chgn Rectangle (hinh chu nhat), dua tr6 chugt vao viing lam viec, nhan trai chugt, giQ dong thdi re de ve mgt hinh chu nhat Tren menu ciia Working model, kich chgn rotate tool (binh mui ten cuon cong), dat tro chugt vao hinh chu nhat de xoay lam nghieng hinh chQ nhat Kich chgn cong cu Rectangle, dua tro chugt vao viing lam viec, nhap trai chugt, giu dong thdi re de ve hinh chu nhat thir hai cho mat tren ciia hai hinh chQ nhat tiep xiic - Kich chgn r\ut Anchor (mo neo), dua vao viing lam viec, dat tro chugt lan lugt len tung hinh chQ nhat vua ve, nhap trai chugt de co dinh chiing Kich diip vao hai hinh chQ nhat, tren menu xo thay doi cac gia tri tai Stat.fric, kin fric elastic (su dan hoi, su nay) ve gia trj (sue can khong mac dinh bang 0) Kich chgn niit Circle (hinh tron), dua tro chugt vao viing lam viec, nhap va giQ trai chugt 26 • de ve vat la mgt hinh tron d dinh mat phang nghieng va tiep xue vdi mat phang nghieng Nhap chgn vat, tren menu chgn Define tren menu trai chgn vectors, tren menu trai chgn Velocity Acceleration Quay lai menu Define chgn Vectors display de bien thi vec ta va Vectors lengths de thay doi dai ciia vec ta Nhap Run de xem boat canh (hinh 1) l-in^llW Hinh: ve len viing lam viec mgt hinh chQ nhat lam mat chuyen dgng Kich chgn binh mo neo (Anchor), dua tro chugt dat len binh chu nhat roi nhap trai chugt de cd djnh hinh chu nhat Tren cong cu kich chgn hinh tron (Circle) hoac hinh vudng ( Square) hay hinh chQ nhat (Rectangle) de ve mgt hinh tuang iing (vat) dat tiep xiic Hinhl vdi mat chuyen dgng Nhap chgn vat muon tao De xem thi mo phong chuyen dgng Tren Menu van toe, nhap chgn vat chgn Define thuc hien cac Tren Menu nhap chgn thao tac sau: Define/ Vectors/ Measura/ Postion roi chgn X Velocity (vec ta van toe) roi Graph neu muon mo phong Define/ Vectors/ Acceleration thi X(t); Measura/ velocity roi (vec ta gia toe); Define/ chgn Xgraph (neu muon mo Vectors/ total Force ( vec to phong thi v^(t); Measura/ luc tong hgp); Define/ Vectors Acceleration neu muon mo Display (de hien thi vec to) phong thi gia toe (hinh 2) danh dau kiem vao Name, b) Tqo mpt chuyen dpng Value cho cac vec to tuang thdng nhanh ddn deu theo ung, nhan Ok de hoan tat; phuong ngang Define/ Vectors lengths (hien Md Working model thi dai vec ta) Tren cong cu chgn Nhap diip len vat tren hinh chQ nhat (Rectangle) de Menu dge hien dat gia tri y TAP CHI THIET Bl GIAO DUC • SO 72 - 8/2011 HirdNG UAN QUAN Li, sir DUNG = 0; = 0; v^ 7^ 0; V0=O v^ = 0; Stat fric = 0; Kin fric = 0; Elastic = Chgn Rectangle ve mgt hinh chQ nhat nho Tren menu chgn Rotate tool de quay nghieng hinh chQ nhat roi dat vao mgt dau binh chQ nhat ldn Chgn Anchor de cd djnh Tao gia trgng: Chgn Square hoac Circle de ve mgt binh vuong hoac mgt hinh tron - Chgn Pulley, dat trd chugt vao hinh tron, re chugt tdi dau tren hinh chQ nhat nho, nhay chugt roi tiep tuc re chugt xuong dudi theo phuong thang dung tdi gap ^ia trgng, nhay dup chugt de ket thiic Chgn Polygon de ve mgt gio hun^ gia trgng; chgn Anchor de co dinh gid De xem thj md ta van toe, nhap chgn vat; tren menu chinh nhan chgn Measure, dat tro chugt vao Velocity, nhan chgn X Graph De xem thj md ta tga X, nhan chgn vat; tren menu chinh nhan chgn Measure; dat tro chugt len Position, nhan chgn X Graph NhSp Run de xem boat canh Neu muon dien lai nhap Reset; muon dung nhan Stop(hinb 3) of" JSI 'U -A Ilinh c) Tqo mot chuyen ddng thdng chdm ddn theo phuffng ngan^ De tao mgt chuyen dgng thang cham dan deu ta lam tuang tu nhu tao chuyen dgng thang deu nhung dat gia trj Kin fric ^ 2) Tao mot chuyen dong nem ngang, nem xien, nem theo phu'O'ng thang diing a) Tqo chuyen ddng nem ngang: Ve mgt mat phang ngang bang cong cu Retangle roi CO djnh n6 bang cong cu Anchor Bang each tuang tir de ve mat phang ngang thu hai (chgn la mat dat) Ve vat dat len mat phang ngang thir nhat Nhap dup len vat Tren menu dge hien chgn v^ i^ 0; neu muon them thi bieu dien X, y, v^, V lam tuang tu tren Nhan Run de xem boat canh b) Tqo chuyen dpng nem xien: Lam tuang tir muc a nhung cbo v,, Vy nhung gia tri khac (v =Vv ^ + \ ^) NbSn Run de xem boat canh c) Tqo chuyen dpng nem theo phuffng thdng dung: Lam tuang tu muc a, b nhung thay v^ = 3) Tao tuong tac xuyen tam dan hoi giira hai vat Ve mgt mat phang ngang bang cong cu Retangle; diing cong cu Anchor de co dinh mat phang ngang; Dung cong cu Circle ve hai hinh tron (hai vat) dat d hai diem khac tren mat phang ngang; - Nhap diip len tirng vat, tren menu dge hien chgn nhung gia tn thich hgp cho v (irng vdi tirng vat) Neu muon hai III vat chuyen dgng ngugc chieu thi dat v^ ciia mgt vat la duang V ciia vat la am; Chon cac gia trj Kin fric, Stat fric Elastic cua hai vat va ciia mat phang ngang bang khong; Vao Meterial de chgn vat lieu cho tung vat (co the ca mat phang ngang); Vao Mass de dat khoi lugng cho tung vat; De hien thi van toe v.v ta lam nhu cac phan tren Nhap Run de xem boat canh (binh 4) Tao lac don, lac 16 xo a) Tqo ldc dffn Ve gia treo lac bang cong cu Retangle va co dinh n6 bang cong cu Anchor - Ve vat bang cong cu Circle Ve day treo bang cong cu Rod (nhap chgn cong cu Rod; dat tr6 chugt vao tam hinh tron, dua tro chugt (theo phuang thang dung) den gap gia treo roi nhap trai chugt) Nhap trai chugt len vat dong thdi giu' de dua vat khoi vi tri can bang - Nhap Run xem boat canh - De hien thi cac vec ta thuc hien cac thao tac nhu da trinh bay d tren b) Tqo ldc lb xo ddt ndm ngang Diing c6ng cu Retangle ve mat phang ngang bang va gia giQ dau 16 xo (dat vuong g6c vdi mat phang ngang) roi dung cong cu Anchor de co djnh chiing - Ve vat bang cong cu Circle Lan lugt chgn vat va mat phang ngang de chgn cac gia tri Kin fric, Stat fric Elastic tuang irng bang khong TAP CHi THIET Bl GIAO DUC - so 72 - 8/2011 • 27 II HirdNG DAN QUAN U, suf DUNG Chgn vat; nhap World/ Air Resistnee/ non (mac dinh la non)/ Ok Ve 16 xo bang cong cu Spring (Kich chgn Spring, dat tro chugt vao tam vat, dua tro chugt den gap gia dd (theo phuang ngang), roi nhap trai chuot llf^^Z : ",.^^vv^ Hmh Dua vat khoi vi tri can bang mgt khoang nho Nhap Run xem boat canh (hinh 5) Muon bien thj cac vec ta va mo ph6ng bang thj thuc hien cac thao tae nhu da gidi thieu d tren Sau thiet ke xong nhap Save As thuc dan file de luu lai De sil' dung mo hinh thiet ki c6 hai each: Cach 1; Md Working model roi md eac file da thiet ke de trinh chieu; Cach 2: Sir dung phan mem Snaglt quay video boat canh de tao mgt file video roi Import n6 vao bai giang Powerpoit hay Hyperlink file video vao mgt vi tri xac dinh tren Slide ciia bai giang Powerpoit Phan mem Snaglt download tu http://wwH' Snaglt.com Su dung phan mem Working Model chiing ta c6 the thiet ke dugc hau bet cac thi nghiem ao cbo phan ca bgc chuang trinh vat li t '^'.>. * ' Hmh thong No cho hgc sinh cai nhin true quan ve su thay doi van tdc, gia toe va luc tac dung len vat thong qua viec cho phep hien thi cac vec to d6 va viec md ph6ng bang cac thi tuang ung Tai lieu tham khao: http;//www.designsimulation.com/wm2d/index pbp Google/ (PDF) Working model 2D iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiniiiiiiiiiiiiiiniiiiiiiiiiiniiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiniiniiiiiiiiMiiiiiMnniniiiiMiiiiiiiiiiiiiiiiii^ *» TIEN HANH THI NGHIEM an Nudc uong c6 gas va nudc n6ng khong the lam Ign ngugc coc nhu tren dugc vi n6 lam tang ap suat d tren chat I6ng va lam tam nhua (hoac bia) rai xuong, chat long se chay xuong het Cac em hgc sinh chi nen lam thi nghiem vdi nudc cho dan gian va tiet kiem Thi nghiem khong dugc dimg td bia tham nudc vi mat td bia tiep xue vdi nudc ma nudc tham vao thi td bia bi cong, khong ap sat vao mieng coc dugc 28 • (Tiep theo trang 25) H2 Chiiy: Thi nghiem c6n mgt sd tru'dng hgp khac: Neu tam nhua dat vao mieng cdc cd hinh dang nhu d hinh hoac la mgt tam sat mong (loai TAP CHi THIET Bj GIAO DUC - so 72 • 8/2011 v6 hop sQa dac) thi nudc khong day cdc nhung Ign ngugc cdc thi tim va nudc ben cung khong bj roi xudng mac dii Iiic Ign ngugc coc khong CO gigt nudc nao chay Neu nudc ben day coc (khong cd bgt coc) thi van cd the de cdc Ign xuong d tu the nghieng nhung nudc khong chay khoi coc Nhu'ng trudng hgp phai giai thich bang kien thii'c d trung bgc thong Khi nao hgc den trung hgc thong cac em se van dung de giai thich nhQng hien tugng ... nhap Save As thuc dan file de luu lai De sil'' dung mo hinh thiet ki c6 hai each: Cach 1; Md Working model roi md eac file da thiet ke de trinh chieu; Cach 2: Sir dung phan mem Snaglt quay video... ciia bai giang Powerpoit Phan mem Snaglt download tu http://wwH'' Snaglt.com Su dung phan mem Working Model chiing ta c6 the thiet ke dugc hau bet cac thi nghiem ao cbo phan ca bgc chuang trinh... tuang ung Tai lieu tham khao: http;//www.designsimulation.com/wm2d/index pbp Google/ (PDF) Working model 2D iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiniiiiiiiiiiiiiiniiiiiiiiiiiniiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiniiniiiiiiiiMiiiiiMnniniiiiMiiiiiiiiiiiiiiiiii^