Question

a car with two passengers travelling at 15m/s collides with a tree. one of the passengers who is not wearing a seat belt strikes the windshield head first and comes to rest in 0.03 s. the area of contact between the head and the windshield is approximately 5 X 10 to the power of -4 m to the power of -2 and the mass of the head is 5.4 kg. the other passenger who is wearing his seat belt comes at rest in 0.50 s. the mass of this passenger is 75 kg. the area of the seat belt in contact with this passenger is about 0.12 m to the power of 2. find the average force and the force per unit area exerted on the two passengers

Answer 1

force = change of momentum/time
= - m v /t

force / area = force / given area

by the way your units for first person's head area are wrong.

Answer 2

GWAPO KO