A 3700-lb automobile (m = 1600 kg) starts from rest on a level road and gains a speed of 45 mi/ h (= 72 km/h) in 33 s. (a) What is the kinetic energy of the auto at the end of the 33 s? (b) What is the average net power delivered to the car during the 33-s interval? (c) What is the instantaneous power at the end of the 33-s interval assuming that the acceleration was constant?

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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