Physics
No work is done by a force if the body:
- moves in the direction of force
- does not move
- moves in opposite direction
- none of these
Work, Energy & Power
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Answer
does not move
Reason — Work is said to be done if the force applied on the body makes the body move but if there is no motion in the body then work done is zero.
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Related Questions
The S.I. unit of work is:
- second
- metre
- joule
- newton
Two coolies A and B do some work in time 1 minute and 2 minute respectively. The power spent is:
- same by both coolies
- is more by coolie A than by B
- is less by coolie A than by B
- nothing can be said
The expression of power P is:
- P = mgh
- P = mv2
- P = F x d
- P = F x
1 H.P. is equal to:
- 1 W
- 1 J
- 764 J
- 746 W