A ball of mass 12.2 g is dropped from rest at a height of 76 cm above the surface of oil that fills a barrel to a depth of 55 cm. The ball reaches the bottom of the barrel with a speed of 1.48 m/s. (a) Neglecting air resistance, find the speed of the ball when it enters the oil. (ball when it enters the oil. (b) What is the change in the internal energy of the system of ball + oil?

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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