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प्रश्न
One horse power is equal to ______.
विकल्प
1000 W
500 W
764 W
746 W
700 W
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उत्तर
One horse power is equal to 746 W.
संबंधित प्रश्न
A boy weighing 40 kgf climbs up a stair of 30 steps each 20 cm high in 4 minutes and a girl weighing 30 kgf does the same in 3 minutes. Compare:
- The work done by them.
- The power developed by them.
How is the unit horsepower related to the S.I. unit of power?
State and define the S.I. unit of work.
State two factors on which power spent by a source depends. Explain your answer with examples.
State the principle of moments.
Work is a scalar quantity because it is a measure of transfer of energy without indicating any direction
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.
The world record for weight lifting was held by Sergei Didyk of the USSR. He lifted 261 kg to a height of 2.3 m in 4s; find:
(a) Weight lifted by him
(b) Work done by him
(c) Power developed by him. (g = 10m/s2)
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).
