A light smooth pulley fixed to the ceiling of an elevator car carries a thread whose ends are attachedd to the loads m1 and m2(m1>m2).The car starts going up with accelaration a.Assume the masses of the pulley to be zero and negligible friction in the system and the ropes are massless.
a)find accelaration of m1 relative to ground.
b)Find force exerted by the pulley on the ceiling of the car.

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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