Block A of mass 1 kg is placed on the rough surface of block B of mas 3 kg. Block B is placed on smooth horizontal surface. Blocks are given the velocities as shown. Find net work done by the frictional force.[in -ve]

Block A of mass 1 kg is placed on the rough surface of block B of mas

1.	Block A of mass 1 kg is placed on the rough surface of block B of mas 3 kg. Block B is placed on smooth horizontal surface. Blocks are given the velocities as shown. Find net work done by the frictional force.[in -ve]
Answer» ANSWER :7