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At what height from the surface of earth the gravitational potential and the value of g are -5.4 x 10' J kg and 6.0

At what height from the surface of earth the gravitational potential and the value of g are -5.4 x 10' J kg and 6.0 ms respectively? Take the radius of earth as 6400 km: (a) 2600 km (b) 1600 km (c) 1400 km (d) 2000 km

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