need solution of hc verma ques: the free end of simple pendulam is attached to a ceiling of a box .the box is taken to a height and the pendulam is oscillated .when the bob is at lowest point ,box is released to falll freely .as seen from the box during this period ,the bob will go in circular path 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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