A particle is moving in a circle of radius R with constant speed v, if radius is double then its centripetal force to keep the same speed should be

Doubled

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Halved

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Quadrupled

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Unchanged

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Solution

The correct option is B
Halved

$F = \frac{m v^{2}}{r}$ . For same mass and same speed if radius is doubled then force should be halved.

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