A box is sitting on a frictionless, level surface. A small spring cannon, which is capable of firing a lump of clay, is lowered into the box on a string attached to the ceiling. Before the cannon is fired, the center of mass of the cannon, clay, and box is fixed at a point A. The cannon fires; the clay shoots from the cannon and sticks to the wall of the box. Does the center of mass of the cannon, clay, and box system move? Explain.

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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