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Q.

Is it true that the SI unit of work is Joule (J)?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
Work is said to be done when a force displaces a body upto some distance in the direction of force. Its unit is N-m also called Joule(J). Mathematically,
work done= force(N) × displacement(m)
Work done = F.s.cosθ
Where F is the force, s is the displacement of the body, θ is the angle between the direction of the force and the displacement of the body.
1 J work is defined as the work done by a force of 1 N in displacing a body through a distance of 1 meter.
 
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