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NEET UG PHYSICS MCQ: GRAVITATION

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Two particles of equal masses are revolving in circular paths of radii

{r_1}\,and\,{r_2}

respectively with the same speed. The ratio of their centripetal forces is

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Correct option: A

\frac{{{r_2}}}{{{r_1}}}

Option A (

\frac{{{r_2}}}{{{r_1}}}

) is correct because the centripetal force is inversely proportional to the radius when mass and speed are constant.

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If a particle of mass m is moving in a horizontal circle of radius r with a centripetal force

\left( { - K/{r^2}} \right)

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F \propto \frac{1}{r^3}

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Statement-2: Because rotation of earth is about polar axis.