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प्रश्न
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उत्तर
P.E. is the energy possessed by a body by virtue of its position, shape or configuration but K.E. is the energy possessed by a body by virtue of its velocity or motion.
E.g. A ball kept on a cliff possesses P.E. but as soon as it is kicked it possesses K.E.
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संबंधित प्रश्न
Work done by a boy depends on the time in which he does work.
What do you mean by degradation of energy?
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.
What should be the angle between the direction of force and the direction of motion of a body so that the work done is zero?
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. If the value of g be 10 m/s2, the work done by the girl against the gravitational force will be :
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
A girl weighting 50 kg climbs up 60 steps each of 20 cm height in 5 minutes. Calculate the power developed.
