A car of mass is moving at

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

Problem

A car of mass

1000\,\text{kg}

is moving at

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

. What minimum constant braking force must act on the car so that it stops in

20\,\text{m}

? (a)

5\,000\ \text{N}

(b)

10\,000\ \text{N}

(c)

7\,200\ \text{N}

(d)

20\,000\ \text{N}

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