If a block m1 is placed on rough surface(coefficent of friction is u1) and a block m2 is placed over m1(coefficent of friction between them is u1),A constant force F acts on m2 towards right(+x).If F is less than f2(frictional force between m1 and m2) and f1(frictional force between m1 and ground) is also less than f2,then how would the motion of the blocks be?

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.

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