A circular disc is rotating with constant angular velocity ? 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?

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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