In a Head-On Automobile Collision, a Person's Momentum Could Be

Multiple Choice

In a head-on automobile collision, a person's momentum could be reduced from 2000 kg m/s to zero in just 0.1 s. If this occurs, the average force exerted to stop the person is

A) 20,000 N.
B) 2,000 N.
C) 200 N.
D) This can't be answered without knowing the person's mass.