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प्रश्न
Distinguish between work and power.
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उत्तर १
Work is said to be done only when the applied force on a body makes the body move but power is the rate of doing work.
The SI unit of work is 'joules' and that of power is 'watt'.
उत्तर २
Work does not depend on time, while the power depends on time.
Power is the work done in unit time.
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संबंधित प्रश्न
.A man raises a box of mass 50kg to a height of 2m in 20s, while another man raises the same box to the same height in 50s. Compare:
(i) the work done, and
(ii) the power developed by them.
What happens to the work done when the dispacement of body is at right angles to the direction of force acting on it? Explain your answer.
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.
What is the work done against gravity when a body is moved horizontally along a frictionless surface?
Name the type of energy possessed by a
(i) stretched catapult (ii) hot iron
(iii) wound up clock
A woman pulls a bucket of water of total mass 5 kg from a well which is 10 s. calculate the power used by her.
What is work?
