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The gravitational field in a region is given by g→=5 N/kgi^+12 N/kgj^. The change in the gravitational potential energy (in Joule) of a particle of mass 1 kg when it is taken from the origin to a point (7 m,-3 m) is:

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Detailed Solution

Gravitational field, I=5+12N/kgI=−dvdr⇒v=−∫0xIxdx+∫0yIydy=−Ix·x+Iy·y=−57−0+12−3−0=−35+−36=1 J/kgi.e., change in gravitational potential 1 J/ kg. Hence change in gravitational potential energy 1 J

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