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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
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No work is done by a force if the body
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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 :
Choose one or more correct alternatives.
Joule is the unit of ______.
- force
- work
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On what factors does the work done by a force depend?
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.
State the energy changes which take place when A stone dropped from the top of a cliff reaches the ground after some time.
State the amount of work done by an object when it moves in a circular path for one complete rotation. Give a reason to justify your answer.
