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प्रश्न
The S.I. unit of energy is .............
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उत्तर
The S.I. unit of energy is joule.
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संबंधित प्रश्न
A weight lifter lifted a load of 200 kgf to a height of 2.5 m in 5 s. Calculate:
- the work done, and
- the power developed by him. Take g = 10 N kg-1
MULTIPLE CHOICE TYPE
In an electric cell which in use, the change in energy is from:
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
What is the SI unit of work?
What is the ratio of SI units to CGS units of 'work'?
Complete the following sentences:
1 H.P. = ........ W.
A girl of mass 50 kg runs up a flight of 40 steps in 20 seconds. If each step in 20 cm high, calculate the power developed by the girl. (g= 10 ms-2).
Give an example
Electrical energy changes to heat energy.
The weights of two bodies are 2.0 N and 2.0 kgf respectively what is the mass of each body?
