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The masses and radii of the Earth and th...

The masses and radii of the Earth and the Moon are `M_1, R_1 and M_2,R_2` respectively. Their centres are at a distance d apart. The minimum speed with which a particel of mass m should be projected from a point midway between the two centres so as to escape to infinity is ........

A

`2 sqrt(G/d (M_(1)+M_(2)))`

B

`2 sqrt((2G)/d (M_(1)+M_(2)))`

C

`2 sqrt((Gm)/d (M_(1)+M_(2)))`

D

`2sqrt((Gm(M_(1)+M_(2)))/(d(R_(1)+R_(2))))`

Text Solution

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The correct Answer is:
A
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