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प्रश्न
The S.I. unit of work is
विकल्प
second
metre
joule
newton
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उत्तर
joule
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संबंधित प्रश्न
Can there be displacement of an object in the absence of any force acting on it? Think. Discuss this question with your friends and teacher.
An electron emitter must have _____________ work function and ___________ melting point.
Give reasons for the following A teacher moving around in the class is doing work but a child standing and reading a book is not doing any work.
Differentiate between energy and power.
A machine raises a load of 750 N through a height of 16 m in 5 s. calculate:
- energy spent by machine,
- power at which the machine works.
How many watts equal one horse power?
A boy of mass m climbs up a staircase of vertical height h.
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- What would have been the work done if he uses a lift in climbing the same vertical height?
In what way does an ‘Ideal machine’ differ from a ‘Practical machine’?
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
Suma is swimming in a pond.
