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प्रश्न
Can a body possess zero kinetic energy?
एका वाक्यात उत्तर
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उत्तर
Yes, if the body is not in motion; it has zero kinetic energy
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संबंधित प्रश्न
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A boy of mass 40 kg climbs up the stairs and reaches the roof at a height 8 m in 5 s. Calculate:
- the force of gravity acting on the boy,
- the work done by him against the force of gravity,
- the power spent by boy. (Take g = 10 m s-2)
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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- the power developed by them. Take g = 10 N kg-1.
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Name the physical quantity whose SI unit is Nm.
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