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A point P (Rsqrt(3)m,0,) lies on the axi...

A point P `(Rsqrt(3)m,0,)` lies on the axis of a ring of mass M and radius R. The ring is located in `y -z` plane with its centre at origin. A small particle of mass m start from P and reaches O under gravitational attraction only. Its speed at O will be.

A

`sqrt((GM)/(R))`

B

`sqrt((Gm)/(R))`

C

`sqrt((GM)/(sqrt(2)R))`

D

`sqrt((Gm)/(sqrt(2)R))`

Text Solution

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The correct Answer is:
A
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