A man of mass `60kg` jumps from a trolley of mass `20kg` standing on smooth surface with absolute velocity `3m//s`. Find velocity of trolley and total energy produced by man.

A boy of mass 60 kg running at 3//s jumps on to a trolley of mass 140 kg moving with a velocity of 1.5m//s in the same direction . What is their common velocity?

Two boys each of mass 40 kg are standing on the right side of a trolley of mass 80 kg , initially at rest on smooth floor. The boys jumps to the right with velocity 3 m//s with respect to the trolley before the jump. Find the final velocity of the trolley if the jumps : (a) together , (b) one after the other and (c ) one boy is on the left and the other on the right , the boy on the left jumps to the left and then the boy on the right jumps to the right. Each boy jumps with 3 m//s with respect to the trolley before the jump.

A girl of mass 35 kg is sitting in a trolley of mass 5 kg. By applying the force on the trolley, it has given the velocity 4ms^(-1) . Trolley comes to rest after covering the distance 16 m, then (1) How much work is done on the trolley? (2) How much work is done on the girl?

A boy of mass m is riding on a trolley of mass M which is moving on smooth floor at speed v_(0) . He jumps off in the opposite direction of motion of trolley with velocity u relative to the trolley before the jump. Find the velocity of the trolley after jump.

A girl having mass of 35 kg sits on a trolley of mass 5 kg. The trolley is given an initial velocity of 4m//s by applying a force. The trolley comes to rest after travelling a distance of 16m. (a) How much work is done on the trolley ? (b) How much work is done by the girl ?

A girl having mass of 35 kg sits on a trolley of mass 5 kg. The trolley is given an initial velocity of 4m//s by applying a force. The trolley comes to rest after traversig a distance of 16m. (a) How much work is done on the trolley ? (b) How much work is done by the girl ?

A block of mass 2kg is placed on the surface of trolley of mass 20kg which is on a smooth surface.The coefficient of friction between the block and the surface of the trolley is 0.25 .If a horizontal force of 2 N acts on the block, the acceleration of the system in ms^(-2) is (g=10ms^(-2))

A trolley of mass M is at rest over a smooth horizontal surface as shown in figure. Two boys each of mass 'm' are standing over the trolley. They jump from the trolley (towards right) with relative velocity v_r [relative to velocity of trolley just after jumping] (a) together (b) one after the other. Find velocity of trolley in both cases.