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.