A man of mass `80 kg` stands on a plank of mass `40 kg`. The plank is lying on a smooth horizontal floor. Initianlly both are at rest. The man starts walking on the plank towards north and stops after moving a distance of `6 m` on the plank. Then

A man of mass 50 kg us standing on a 100 kg plank kept on a fricitonless horizontal floor. Initially both are at rest. If the man starts walking on the plank with speed 6m//s towards right relative to the plank, then amount of muscle energy spent by the man is

A man of mass 50 kg us standing on a 100 kg plank kept on a fricitonless horizontal floor. Initially both are at rest. If the man starts walking on the plank with speed 6m//s towards right relative to the plank, then amount of muscle energy spent by the man is

A man of mass m is standing on a plank of equal mass m resting on a smooth horizontal surface. The man starts moving on the plank with speed u relative to the plank. The speed of the man relative to the ground is

A man of mass m is standing on a plank of equal mass m resting on a smooth horizontal surface. The man starts moving on the plank with speed u relative to the plank. The speed of the man relative to the ground is

A car C of mass m_(1) , rests on a plank of mass m_(2) . The plank rests on a smooth floor. The string and pulley are ideal. The car starts and moves towards the pulley with certain acceleration :

A car of mass m_(1) rests on a plank P of mass m_(2) . The plank rests on a smooth floor. The string and pulley are ideal. The car starts and moves towards the pulley with acceleration.

A man of mass m is moving with a constant acceleration a w.r.t. plank. The plank lies on a smooth horizontal floor. If mass of plank is also m then the frictional force exerted by plank on man is ma/k. Find the value of k.

A man of mass m is moving with a constant acceleration a w.r.t. plank. The plank lies on a smooth horizontal floor. If mass of plank is also m then the frictional force exerted by plank on man is ma/k. Find the value of k.