Q68) A metre stick weighing 240g is pivoited at its upper end in such a way that it can freely rotate in a vertical plane through this end. A particle of mass 100g is attached to upper end of the srick through a light string of length 1m. Initially, the rod is kept vertical and the string horizontal when the system is released from rest. the particle collides with the lower end and sticks there. Find max. angle through which the stick will rise.

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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