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A spacecraft is launched in a circular o...

A spacecraft is launched in a circular orbit very close to earth. What additional velocity should be given to the spacecraft so that it might escape the earth's gravitational pull.

A

`20.2 Kms^(-1)`

B

`3.25 Kms^(-1)`

C

`8 Kms^(-1)`

D

`11.2 Kms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`v=sqrt(2gR)-sqrt(gR), v=sqrt(gR)(sqrt(2)-1)`
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