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A diametrical tunnel is dug across the e...

A diametrical tunnel is dug across the earth. A ball dropped into the tunnel from one side. The velocity of the ball when it reaches the centre of the earth is [Given: gravitational potential at the centre of earth `= -3//2(GM//R)`]

A

`sqrtR`

B

`sqrt(gR)`

C

`sqrt(2.5gR)`

D

`sqrt(7.1gR)`

Text Solution

Verified by Experts

The correct Answer is:
B
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