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Q.

What is the formula for the work done on a body (W) when a force acts on the body in the direction of its displacement?


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a

W=F×s   

b

W=mgh

c

Both 1 and 2

d

None of these 

answer is A.

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Detailed Solution

Work done in moving a body (W) is equal to the product of force exerted on the body and the distance moved by the body in the direction of the force. Mathematically,
                                                 W=F×s   
Where F is the force exerted, and s is the displacement of the body in the direction of the force.
The standard unit of work is the Joule (J), or  Newton-metre(N-m).   
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