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JEE PHYSICS MCQ: GRAVITATION

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Application +4 | -1

A point

P\left( {R\sqrt 3 ,0,0} \right)

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

O

. A small particle of mass m starts from P and reaches

O

under gravitational attraction only. Its speed at

O

will be

View answer and explanation

Correct option: A

\sqrt {\frac{{GM}}{R}}

Option A (

\sqrt {\frac{{GM}}{R}}

) is correct because the speed at O is calculated using conservation of energy.

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