Block A of mass 2 kg is placed over a Block B of mass 8 kg. The combination is placed on a rough horizontal surface. If g=10 ms^-2, coefficient of friction between B and floor= 0.5, coefficient of friction between A and B = 0.4 and a horizontal force of 10N is applied on 8kg block, Then the force of friction between A and B is?

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