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संबंधित प्रश्न
Define work.
The moon is revolving around the earth in a circular path. How much work is done by the moon?
Name the forms of energy which a wound-up watch spring possesses.
A body of mass 5 kg falls from a height of 10 m to 4 m. Calculate:
The loss in potential energy of the body,
A vessel containing 50 kg of water is placed at a height 15 m above the ground. Assuming the gravitational potential energy at ground to be zero, what will be the gravitational potential energy of water in the vessel? (g = 10 m s-2)
How much work is done by the gravitational force of earth acting on a satellite moving around it in a circular path? Give reason for your answer.
Name five appliances or machines which use an electric motor.
What is meant by a translational motion? Give one example.
How long should an electric motor, of power 2 H.P. operate, so as to pump 5 m3 of water from a depth of 15m. [Take g = 10 N kg−1]
