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A particle hanging from a spring stratch...

A particle hanging from a spring stratches it by `1cm` at earth's surface. Radius of the earth is `6400 km`. At a place `800 km` above the earth's surface, the same particle will stretch the spring by

A

`0.79 cm`

B

`1.2 c m`

C

`4 cm`

D

`17 cm`

Text Solution

Verified by Experts

The correct Answer is:
A
`epropg`, here `(g_(h))/g=(R^(2))/((R+h)^(2))`
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