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संबंधित प्रश्न
Name the quality which is measured in kW.
State the condition when a force produces
(i) linear motion.
(ii) rotational motion, in a body.
It takes 20 s for a person A of mass 50 kg to climb up the stairs, while another person B of same mass does the same in 15 s. Compare the power developed by the persons A and B.
A boy takes 3 minutes to lift a 20 litre water bucket from a 20 m deep well, while his father does it in 2 minutes. Compare:
- the work, and
- power developed by them.
State and define the unit of force in the S.I. system.
What is the work done by the gravitational force on the moon that revolves around the earth?
State two conditions for work to be done.
What is the S.I. unit of work? Define it.
A man weighing 700 N runs up a flight of 15 steps, each 20 cm high, in 5 seconds. Calculate the power of the man.
For the following scenarios, state whether the work done by gravity is positive, negative, or zero.
A person walks on a levelled road.
