A uniform disk with mass M=16kg and radius R=0.15m,a block weighted 8 kg is hanging by a weightless rope wrapped around the rim of the disk,find:1)the acceleration of the block, 2)the tension in the rope Solution TR=. 21 R T Ma mg-T ma mg 8×10 a= 5m.s2 mg m+M/2 8+8 T=×16×5=40NA uniform disk with mass M=16kg and radius R=0.15m, a block weighted 8 kg is hanging by a weightless rope wrapped around the rim of the disk,find:1) the acceleration of the block, 2)the tension in the rope Solution： mg T  maR a TR  MR  2 2 1 T Ma 2 1  2 5 8 8 8 10 2         m s m M m g a T 16 5 40 N 2 1     m M m mg T