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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
A coolie X Carrying a load on his head climbs up a slope and another coolie Y carrying the identical load on his head move the same distance on a frictionless horizontal platform. Who does more work? Explain the reason.
The work done by a fielder when he takes a catch in a cricket match, is negative. Explain.
State the condition when the work done by a force is negative. Explain with the help of examples.
A man spends 7.4 kJ energy in displacing a body by 74 m in the direction in which he applies force, in 2.5 s. Calculate the power spent (in H.P) by the man.
A pump is used to lift 600 kg of water from a depth of 75 m in 10s. Calculate:
- The work done by the pump,
- the power at which the pump works, and
- The power rating of the pump if its efficiency is 40%. (Take g = 10m s-2).
`["Hint" : "Efficiency" = "useful power"/"power input"]`
State and define the unit of force in the S.I. system.
In the following case write yes, if the work is being done and no if no work is being done.
A man trying to push a wall.
State the condition when the work done by the force is positive
Justify the statement. “Power can be expressed as the product of force and velocity.”
State the S.I. and C.G.S. units of energy. How are they related?
