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Question

A circular disc is rotating with constant angular velocity ω about an axis that passes through the centre. A particle 'P' is kept at a distance of 2m from the centre and another particle 'Q' at a distance of 3m from the centre.

Which of these will have higher centripetal acceleration?


A

P

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B

Q

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C

both have equal

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D

can't say until value of ω is given

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Solution

The correct option is B

Q


If a particle goes in a circle with constant ω then it has a centripetal acceleration given by ω2R since ω is constant for both particles. So the acceleration depends on R

RQ>RP
ω2RQ>ω2RP

So particle q will have higher centripetal acceleration.


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