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प्रश्न
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उत्तर
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संबंधित प्रश्न
State two conditions when no work is done by a force.
State two factors on which the work done on a body depends.
Give reasons for the following A teacher moving around in the class is doing work but a child standing and reading a book is not doing any work.
Is it possible that a force is acting on a body but still the work done is zero? Explain giving one example.
Does the earth move around the sun with a uniform velocity?
What do you mean by a kilo joule?
Fill in the boxe to show the corresponding energy transformation.
An electric motor pump is 60% efficient and is rated 2.5 H.P. Calculate the maximum load it can lift through a height of 10m in 8 sec. (1 H.P. = 750 W).
State whether work is done or not, by writing yes or no, in the following case:
A boy climbs up 20 stairs.
