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The ratio of K.E. regd. to be given to s...

The ratio of K.E. regd. to be given to satellite to escape earth's gravitational field to K.E. regd. to be given to satellite to move in a circular orbit just above earth's atmosphere is :

A

1

B

2

C

0.5

D

infinity.

Text Solution

Verified by Experts

The correct Answer is:
B
`v_(e )=sqrt(2gR), v_(0)=sqrt(gR)`.
`therefore ((1)/(2)mv_(e)^(2))/((1)/(2)mv_(0)^(2))=((v_(e))/(v_(0)))^(2) =(sqrt(2))^(2)=2`
So the correct choice is (b).
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