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At what height from the surface of earth the gravitation potential and the value of g are −5.4×107 Jkg−2 and 6.0 ms−2 respectively? Take the radius of earth as 6400 km.

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Solution

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g=GM(R+h)2=6 ...... (2)

Dividing the two equations, we get:

⇒5.4×107(R+h)=6

⇒R+h=9000 km

⇒h=2600 km

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