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A skylab of mass m kg is first launched ...

A skylab of mass `m` kg is first launched from the surface of the earth in a circular orbit of radius `2R` (from the centre of the earth) and then it is shifted from this circular orbit to another circular orbit of radius `3R`. The minimum energy required to place the lab in the first orbit and to shift the lab from first orbit to the second orbit are

A

`(3)/(4)`mgR,`(mgR)/(6)`

B

`(3)/(4) mg R, (mgR)/(12)`

C

mgR, mgR

D

2mgR, mgR

Text Solution

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The correct Answer is:
B
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