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संबंधित प्रश्न
If the power of a motor is 100 kW, at what speed can it raise a load of 50,000 N?
A satellite revolves around the earth in a circular orbit. What is the work done by the force of gravity? Give reason.
The work done by a fielder when he takes a catch in a cricket match, is negative. Explain.
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 force applied.
Name two places in india where electricity is generated from nuclear power plants.
State the principle of moments.
What do you mean by a centrifugal force?
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"]`
A coolie carrying a load on his head and moving on a frictionless horizontal platform does no work. Explain the reason why.
For the following scenario, state whether the work done by gravity is positive, negative, or zero.
A person climbs a ladder.
