Two identical cars A and B are moving on a straight road with speeds and respectively

PHYSICS · Single correct · GCSE · Physics · Forces · Forces

Problem

Two identical cars A and B are moving on a straight road with speeds

40\,\text{km\,h}^{-1}

and

80\,\text{km\,h}^{-1}

respectively. Both apply identical brakes producing the same uniform deceleration. What is the ratio of their respective stopping distances

s_B : s_A

? (a)

2:1

(b)

1:4

(c)

8:1

(d)

4:1