Two identical cars A and B travel around concentric circular tracks with the same…

PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

Two identical cars A and B travel around concentric circular tracks with the same angular speed

\omega

. The radius of A’s track is

r

and that of B’s track is

2r

. The ratio of their centripetal accelerations

a_A : a_B

is (a)

2:1

(b)

1:4

(c)

1:2

(d)

1:1