A car moving at can be brought to rest by its brakes in

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A car moving at

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

can be brought to rest by its brakes in

8\,\text{m}

. Keeping the same braking force, the distance required to stop the car when it is moving at

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

will be (a)

24\,\text{m}

(b)

32\,\text{m}

(c)

64\,\text{m}

(d)

16\,\text{m}

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