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प्रश्न
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उत्तर
This is because at each point of the circular path, the displacement is perpendicular to the force, which is directed towards the centre, along the radius.
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संबंधित प्रश्न
The S.I. unit of energy is .............
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.
State two advantage of producing hydroelectricity.
Choose one or more correct alternatives.
Joule is the unit of ______.
- force
- work
- power
- energy
Is power a scalar quantity?
Complete the following sentences:
The SI unit of work is ....... and of power is .......
A cricket ball is thrown up from the earth's surface. What happens to its P.E.
(a) during the motion
(b) at the highest point?
Fill in the boxe to show the corresponding energy transformation.
State larger units of power.
