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प्रश्न
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उत्तर
SI unit of power = watt
CGS unit of power = erg per second
1` W = 1 J s -1 = 107 erg s -1
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संबंधित प्रश्न
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:
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Explain degradation of energy by taking two examples of your daily life.
Name the type of energy possessed by a
(i) stretched catapult (ii) hot iron
(iii) wound up clock
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What do you understand by the term energy? Is energy a scalar or vector? How is the energy possessed by a body measured?
A force is applied on a body of mass 20 kg moving with a velocity of 40 ms−1. The body attains a velocity of 50 ms−1 in 2 seconds. Calculate the work done by the body.
