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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
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A sailboat is moving due to wind energy.
When is work said to be done by a force?
MULTIPLE CHOICE TYPE
In an electric cell which in use, the change in energy is from:
A box of weight 150 kgf has gravitational potential energy stored in it equal to 14700 J. Find the height of the box above the ground. (Take g = 9.8 N kg-1)
A body of mass 5 kg falls from a height of 10 m to 4 m. Calculate:
The loss in potential energy of the body,
State the energy transformation on the following:
Electricity is obtained from solar energy.
What is the SI unit of work?
State whether work is done or not, by writing yes or no, in the following case:
A boy climbs up 20 stairs.
