Work done upon a body is:

Choose correct relation:

Two bodies of mass 1 kg and 4 kg possess equal momentum. The ratio of their K.E.:

When you compress a spring you do work on it. The elastic potential energy of spring:

An object of mass 10 kg falls from height 10 m. Kinetic energy gained by the body will be approximately equal to:

A moving body need not have:

Chlorophyll in the plants convert the light energy into:

A weight lifter lifts 240 kg from the ground to a height of 2.5 m in 3 seconds his average power is:

A body of mass 10 kg is dropped from a point where it possesses energy of 100 J. Then the K.E. when it reaches ground would be:

The power of pump which takes 10 s to lift 100 kg of water to fill a tank situated at height of 20 m is: