Potential energy of a body in position A is-40J. Work done by conservative force in moving the body from A to B is`-20J`. Find potential energy of the body in position B.
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B
Work done by a conservtive force is given by `W_(ArarrB)=-DeltaU=-(U_(B)-U_A)=U_(A)-U_(B)` `rArr` `U_(B)=U_(A)-W_(ArarrB)=(-40)-(-20)=-20J`.
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