A spring fixed at the bottom end of an incline of inclination 37º. A small block of mass 2 kg starts slipping down the incline from a point 4.8 m away from the spring. the block compresses the spring by 20 cm, stops momemtarily and then rebounds through a distance of 1 m up the incline. find the spring constant of the spring.

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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