A satellite revolving round the earth in a circular orbit with orbital velocity `v_(0)`. It has kinetic energy E. The additional kinetic energy required to be given to it so that it esscapes from the earth is

Options

A. 4 E
B. 3 E
C. 2 E
D. E

Answer

d

Explanation

`(E_(2))/(E_(1))=((1)/(2)mv_(e)^())/((1)/(2)mv_(e)^(2))=((2GM)/(R))/((GM)/(R))`
`(E_(1))/(E_(1))-1=2-1=1`
`E_(2)-E_(1)=E`
`DeltaE=E`