A circular turntable initially rotates with period
PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
A circular turntable initially rotates with period T0. Point A on the surface is at distance r from the center. After the motor slows, the period becomes 2T0. At that later time, consider point B, located 3r from the center.
What is the ratio of the magnitude of B’s centripetal acceleration after the slowdown to the magnitude of A’s centripetal acceleration before the slowdown?
(a) 1.5
(b) 6.0
(c) 0.75
(d) 3.0