Physics

Problem

1000\,\text{kg}

car moving at

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

comes to rest either in

0.20\,\text{s}

(without an airbag) or in

0.60\,\text{s}

(with an airbag). What is the ratio of the magnitudes of the average stopping force without airbag to that with airbag? a)

9:1

3:1

1:3

1:1