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प्रश्न
What are the units of (a) work, and (b) energy?
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उत्तर
The units of work and energy are the same.
(a) Work - Joule (J)
(b) Energy - Joule (J)
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संबंधित प्रश्न
A force of 30 N acts on a body and moves it through a distance of 5 m in the direction of force. Calculate the work done by the force.
State the SI unit of work.
In case of negative work, the angle between the force and displacement is :
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. If the value of g be 10 m/s2, the work done by the girl against the gravitational force will be :
An electric motor drives a machine which lifts a mass of 4 kg through a height of 10 m in 5 s at a constant speed. Assuming g = 10 ms-2, calculate
(i) the amount of work done, (ii) the power of the machine.
Fill in the boxe to show the corresponding energy transformation.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
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