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प्रश्न
________ is said to be done when a force is acting on it.
पर्याय
Ramp
Simple machines
Work
Energy
Pulley
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उत्तर
Work is said to be done when a force is acting on it.
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संबंधित प्रश्न
Explain briefly why the work done by a fielder when he takes a catch in a cricket match is negative.
State two conditions when no work is done by a force.
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(i) the work done, and
(ii) the power developed by them.
What do you mean by degradation of energy?
When is the work done by a force on a body : (a) positive, (b) negative, and (c) zero?
Complete the following sentences:
The SI unit of work is ....... and of power is .......
A cricket ball is thrown up from the earth's surface. What happens to its P.E.
(a) during the motion
(b) at the highest point?
Calculate the amount of work done by a child carrying a bag of 20 kg when he moves a distance of 40 m in
(a) Vertical direction, and
(b) Horizontal direction
