A disc is rolling without slipping with angular velocity ω. P and Q are two points equidistant from the centre C. The order of magnitude of velocity is:-

Question

G1 Physics · Accepted Answer

For pure rolling, velocity of any point is v⃗ = v⃗CM + ω⃗×r⃗ and vCM=ωR. Using the positions P and Q shown in the figure, the rotational velocity at Q adds more strongly to vCM, while at P it partially cancels it. Hence vQ>vC>vP, so option A.