A man can swim at 4m/s in a still water swimming pool. He enters a 200m wide river at one bank and swims (w.r.t. water) at an angle of 60 degree to the river flow velocity. The river flow velocity 5m/s. In how much time does he cross the river? Calculate his drift?

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