A fully loaded freight elevator has a total mass of 1220 kg. It is required to travel downward 54.5 m in 43.0 s. The counter-weight has a mass of 1380 kg . Fine the power output, in hp, of the elevator motor. Ignore the work required to start and shop the elevator; that is, assume that it travels at constant speed.

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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