Physics

What happens to the potential energy of a body if its height from the earth's surface is tripled?

The rate of doing work is measured in:

Two bodies of masses m and 4m are moving with equal linear momentum. The ratio of their kinetic energies is:

A weightlifter holds a 100 kg weight over his head for 10 seconds. Work done by him during these 10 seconds is:

The sum of kinetic and potential energy of a falling body at any point is:

Which form of energy is possessed by a flying bird?

When we wind a watch, we store:

Work done is a maximum when the angle between force and displacement is:

What is the energy conversion in a microphone?

The work done by a force of 10 N in moving an object through a distance of 2 m at an angle of 60 degrees is:

Which of the following does not possess kinetic energy?

An object of mass 1 kg has a kinetic energy of 1 Joule. Its speed is:

The power of a motor which can lift 600 kg of water through a height of 20 m in 1 minute is: (g = 10 m/s^2)

Energy stored in food is in the form of:

When a body is moving on a friction-less horizontal surface, work done by gravity is:

If the momentum of a body is increased by 100%, its kinetic energy will increase by:

Which of the following is not a unit of power?

What is the work done by a person who holds a 10 kg weight at a height of 2 m for 5 minutes?

An electric bulb of 60 W is used for 10 hours daily. How many 'units' of energy are consumed in 30 days?

If a body is moved through a distance s by a force F, the work done W is given by: