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प्रश्न
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उत्तर
Work
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संबंधित प्रश्न
A pair of bullocks exerts a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field?
Explain briefly why the work done by a fielder when he takes a catch in a cricket match is negative.
A coolie is moving on a road with a luggage on his head. Does he perform work against the force of gravity? Give reason for your answer.
A weight lifter lifted a load of 200 kgf to a height of 2.5 m in 5 s. Calculate:
- the work done, and
- the power developed by him. Take g = 10 N kg-1
The work done on an object does not depend on ______.
Name the type of energy possessed by a
(i) stretched catapult (ii) hot iron
(iii) wound up clock
Fill in the boxe to show the corresponding energy transformation.
The work done by the heart is 1 Joule per beat. Calculate the power of the heart if it beats 72 times in one
