A.νB=ιωsinφ B.νB=ιωcosφ C.νB=ιωcos2φ D.νB=ιωsin2φ
A. B. C. D.
A.2mg B.mg C. D.
A.1.5m/s B.2m/s C.2.5m/s D.3m/s
A.mRω,mRω,mlω,ml/2ω B.0,mRω,ml/2ω,0 C.mRω,mRω,ml/2ω,0 D.0,mRω,mlω,ml/2ω
A.2k B. C. D.
A.0 B.50N C.200N D.100N