A 1340-kg car traveling

east at 13.6 m/s (20 mi/h) has a head-on collision with a
1930-kg car traveling west at 20.5 m/s (30 mi/h). If the collision
time is 0.10 s, what is the force needed to restrain a 68-kg
person in the smaller car? In the larger car?

I understand how to find out what the magnitude and direction of collision will be, but I do not understand exactly what this question is asking- or how to find the answer. Thanks!

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