Cars A and B move on concentric circular tracks of radii and respectively

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

Problem

Cars A and B move on concentric circular tracks of radii

50\,\text{m}

and

75\,\text{m}

respectively. If the speed of A is

10\,\text{m s}^{-1}

and that of B is

12\,\text{m s}^{-1}

, the ratio of their centripetal accelerations

a_A : a_B

is (a)

5:4

(b)

25:24

(c)

25:36

(d)

24:25