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Work done by a conservative force in bri...

Work done by a conservative force in bringing a body from infinity to A is 60 J and to B is 20J. What is the difference in potential energy between point A and B, i.e. `U_(B)-U_(A)`.

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The correct Answer is:
D
`U_(A) =-60J`
`U_(B) =-20J`
` :. U_(B)-U_(A) =40J`
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