A 53-Ib (= 240-N) trunk rests on the floor. The coefficient of static friction between the trunk and the floor is 0.41, while the coefficient of kinetic friction is 0.32. (a) What is the mini- mum horizontal force with which a person must push on the trunk to start it moving? (b) Once moving, what horizontal force must the person apply to keep the trunk moving with constant velocity? (c) If, instead, the person continued to push with the force used to start the motion, what would be the acceleration of the trunk?

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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