Ball A is thrown up vertically with speed 10m/s and at the same instant another ball B is released from rest at hieght h. At time t ,the speed of A relative to B is

(a) 10m/s

(b) 10-2gt

(c) √10^2-2gh

(d)10-gt

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