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प्रश्न
What are the units of (a) work, and (b) energy?
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उत्तर
The units of work and energy are the same.
(a) Work - Joule (J)
(b) Energy - Joule (J)
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संबंधित प्रश्न
Define 1 joule of energy.
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.
A boy weighing 25 kgf climbs up from the first floor at height 3 m above the ground to the third floor at height 9m above the ground. What will be the increase in his gravitational potential energy? (Take g = 10 N kg -1)
State the SI unit of work.
What should be the angle between the direction of force and the direction of motion of a body so that the work done is zero?
A boy tries to push a truck parked on the roadside. The truck does not move at all. Another boy pushes a bicycle. The bicycle moves through a certain distance. In which case was the work done more : on the trick or on the bicycle? Give a reason to support your answer.
How many watts equal one horse power?
Define 'joule'.
Is power a scalar quantity?
What should be the characteristic of a source of energy?
