71 A man stands on a frictionless horizontal ground He

Last updated: 6/25/2023

71 A man stands on a frictionless horizontal ground He slides a 10 kg block on the surface with a speed of 3 m s relative the ground towards a vertical massive wall The wall itself it moving towards the man at a constant speed of 2 m s The block makes a perfectly head on elastic collision with the wall rebounds and reaches back to the man 3 second after the throw At the moment the block was thrown the wall was at a distance of 10 m from the man a Find the mass of the man b Find the ratio of work done by the man in throwing the block to the work done by the wall on the block