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प्रश्न
Can two agents, doing the same work, have different power?
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उत्तर
Yes, since power = work/time the two agents can have different powers if they take different amounts of time to do the same work.
संबंधित प्रश्न
A water pump raises 50 litres of water through a height of 25 m in 5 s. Calculate the power of the pump required.
(Take g = 10 N kg-1 and density of water = 1000 kg m-3)
How many watts equal one horse power?
Choose one or more correct alternatives.
For work to be performed, energy must be ______.
- transferred from one place to another
- concentrated
- transformed from one type to another
- destroyed
Name the physical quantity whose SI unit is Nm.
Give two examples of couple actions in our daily life.
Name the type of energy possessed by a
(i) stretched catapult (ii) hot iron
(iii) wound up clock
A cricket ball is thrown up from the earth's surface. What happens to its P.E.
(a) during the motion
(b) at the highest point?
In the following case write yes, if the work is being done and no if no work is being done.
A boy climbing up a staircase.
What do you understand by the term energy? Is energy a scalar or vector? How is the energy possessed by a body measured?
How long should an electric motor, of power 2 H.P. operate, so as to pump 5 m3 of water from a depth of 15m. [Take g = 10 N kg−1]
