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प्रश्न
Work done = Force × ........................................
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उत्तर
Work done = Force ×distance moved in direction of force.
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संबंधित प्रश्न
Define work.
State two conditions when no work is done by a force.
A car is being driven by a force of 2.5 ✕ 1010 N. Travelling at a constant speed of 5 m/s, it takes 2 minutes to reach a certain place. Calculate the work done.
Name the physical quantity whose SI unit is Nm.
A machine raises a load of 750 N through a height of 16 m in 5s. calculate:
(i) work done by machine,
(ii) power at which the machine works.
The work done by the heart is 1 Joule per beat. Calculate the power of the heart if it beats 72 times in one.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
An engine is pulling a train.
State whether work is done or not, by writing yes or no, in the following case:
A man pushes a wall.
