Physics

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}

10\,000\ \text{N}

7\,200\ \text{N}

20\,000\ \text{N}