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प्रश्न
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उत्तर
The SI unit of centripetal force is newton (N).
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संबंधित प्रश्न
When a body is placed on a table top, it exerts a force equal to its weight downwards on the table top but does not move or fall
1) Name the force exerted by the table top
2) What is the direction of the force?
When does a force do work?
Name the quality which is measured in kWh.
State the principle of moments.
A man raises a box of mass 50 kg to a height of 2 m in 20s, while another man raises the same box to the same height in 50s. Calculated:
- the work done, and
- the power developed by each man. Take g = 10 N kg-1.
What is the S.I. unit of work? Define it.
State the S.I. and C.G.S. units of energy. How are they related?
A machine raises a load of 750 N through a height of 16 m in 5 seconds. Calculate the power at which the machine works.
A boy weighing 50 kgf climbs up from the first floor at a height of 3 m above the ground to the third floor at a height of 9 m above the ground. What will be the increase in his gravitational potential energy? (Take g = 10 N kg-1).
