Consider a Man having mass M and holding two balls each of mass m is at rest over a frictionless surface. Now the person throws one ball towards right direction with velocity “ v “ w.r.t himself . After 1 second he throws another ball towards left direction with velocity “ v “ w.r.t himself . (state True or false statement)

1) The final velocity of Man = 0

2) Center of mass would not change.

3) The momentum of each ball after thrown will be equal.

4) The man will do more work when he threw first ball than that of second ball

Three identical balls are placed on a frictionless horizontal surface touching each other. They stick to each other because of adhesive. Another ball of same radius and mass m is placed over the void created by the three balls. Find the forces applied by the balls kept on the floor to each other if the system remains in equilibrium.

A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.

11

21

31

41