NEET | 2016GravitationHard

Question

At what height from the surface of earth the gravitation potential and the value of g are -5.4 × 107 J kg-2 and 6.0 ms-2 respectively? Take the radius of earth as 6400 km:

Options

A.

2600 km

B.

1600 km

C.

1400 km

D.

2000 km

Solution

V=GMR+h=-5.4×107
g=GM(R+h)2=6
∴ 5.46×107=R+h
∴ a ×106=6.4×106+h
∴ h = 2600 km

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