A very large plank P of some unknown mass is being moved

Last updated: 6/7/2023

A very large plank P of some unknown mass is being moved with velocity u in positive x direction under application of an external force not shown in figure Simultaneously a block B of mass m placed on the plank is also moving with velocity vok All these velocities are with respect to ground frame and at t 0 Coefficient of friction between the plank and the block is u Choose the correct option s 7 Kinetic friction force acting on the block at t 0 is mgk At t 0 power developed with respect to ground frame by kinetic friction force on the block B is jmy 2vo At t 0 power developed with respect to ground frame by kinetic friction force on the block B is jamgvo 2 CORRECT ANSWER At t 0 heat dissipation per sec in the system is 2 2pangya