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प्रश्न
Work is said to be done by a forte only when ................
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उत्तर
Work is said to be done by a forte only when the body moves.
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संबंधित प्रश्न
In which of the following cases, is work being done?
(i) A man pushing a wall.
(ii) a coolie standing with a load of 12 kgf on his head.
(iii) A boy climbing up a staircase.
A boy of weight 40 kgf climbs up the 15 steps, each 15 cm high in 10 s and a girl of weight 20 kgf does the same in 5 s. Compare:
- the work done, and
- the power developed by them. Take g = 10 N kg-1.
The work done on an object does not depend on ______.
On what factors does the work done by a force depend?
A canon ball of mass 500g is fired with a speed of 15m/s-1. Find: its momentum.
In the following case write yes, if the work is being done and no if no work is being done.
A coolie standing with a heavy load on his head
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 larger units of power.
