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प्रश्न
No work is done by a force if the body
विकल्प
moves in direction of force
does not move
moves in opposite direction
none of the these
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उत्तर
does not move
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संबंधित प्रश्न
It takes 20 s for a person A of mass 50 kg to climb up the stairs, while another person B does the same in 15 s. Compare the work done.
Choose one or more correct alternatives.
Joule is the unit of ______.
- force
- work
- power
- energy
What is the work done when the object acted upon by a force remains at rest?
Distinguish between work and power.
Fill in the boxe to show the corresponding energy transformation.
A is a push or a pull ______.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
An engine is pulling a train.
Force acting on a particle moving in a straight line varies with the velocity of the particle v as F = `K/v`, where K is a constant. The work done by this force in time t is
