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प्रश्न
Give two examples of couple action in our daily life.
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उत्तर
Examples of couple action in daily life:
(i) Opening and closing the cap of a bottle
(ii) Turning a key in a lock
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संबंधित प्रश्न
A force of 50 N acts on a body and moves it a distance of 4 m on horizontal surface. Calculate the work done if the direction of force is at an angle of 60° to the horizontal surface.
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.
A coolie, with a load of 30 kg on his head, walks on the platform. If he walks a distance of 60 m, what is the work done by him?
Is power a scalar or a vector quantity?
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.
State whether work is done or not, by writing yes or no, in the following case:
A boy climbs up 20 stairs.
