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प्रश्न
State the energy changes which take place when A toy car with a wound spring moves on ground.
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उत्तर
P.E (Wound spring) to K.E. (motion)
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संबंधित प्रश्न
A weight lifter lifted a load of 200 kgf to a height of 2.5 m in 5 s. Calculate:
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- the power developed by him. Take g = 10 N kg-1
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(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.
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How fast should a boy weighting 30 kg run so that his kinetic energy is 375 joule?
State the energy changes which take place when A stone dropped from the top of a cliff reaches the ground after some time.
