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Standard XII

Physics

Angular Velocity

A circular di...

Question

A circular disc is rotating about its own axis. Two particles P and Q of the disc are at distances $4 c m$ , $6 c m$ from the axis of rotation. The ratio of centripetal accelerations of P and Q will be:

2 : 3

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4 : 9

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3 : 2

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9 : 4

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Solution

The correct option is A $2 : 3$
$ω$ is same for both P and Q.

$\frac{F c, p}{F c, q} = \frac{m w^{2} R P}{m w^{2} R Q}$ $= \frac{4}{6}$ $= \frac{2}{3}$

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Similar questions

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A circular disc is rotating about its own axis. Two particles P and Q of the disc are at distances 4 cm, 6 cm from the axis of rotation. The ratio of centripetal accelerations of P and Q will be:

The correct option is A 2:3ω is same for both P and Q.Fc,pFc,q=mw2RPmw2RQ=46=23

A circular disc is rotating about its own axis. Two particles P and Q of the disc are at distances $4 c m$ , $6 c m$ from the axis of rotation. The ratio of centripetal accelerations of P and Q will be:

The correct option is A $2 : 3$
$ω$ is same for both P and Q.

$\frac{F c, p}{F c, q} = \frac{m w^{2} R P}{m w^{2} R Q}$ $= \frac{4}{6}$ $= \frac{2}{3}$