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At what height from the surface of earth...

At what height from the surface of earth the gravitation potential and the value of `g` are `- 5.4 xx 10^(7) J kg^(-2)` and `6.0 ms^(-2)` respectively ? Take the radius of earth as `6400 km`:

A

2600 km

B

1600 km

C

1400 km

D

2000 km

Text Solution

Verified by Experts

The correct Answer is:
A
Gravitational Potential
`V=(-GM)/(R+h)=-5.4xx10^(-7)`
and `g.=(GM)/((R+h)^2)=6rArr5.4xx10^(7)xx1/((R+h))=6`
`rArrR+h=(5.4xx10^7)/6=h=2600km`
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