A block of mass m moves on a horizontal circle against the wall of a cylindrical room of radius r. Coefficient of friction between the block and the wall is μ and the floor is rough, with a friction coefficiant is μ. If the ball is given with initial velocity v₀, find the velocity of the block after one complete revolution.

The above is part one of the question,

So,

(ii) In part (1), how many revolutions are complted if the velocity of the ball reduces to 1/e times its initial velocity v_0.

_{Sir, pls answer to the second part only. Plzz detailed step by step solution,}

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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