9. Rhonda, who has a mass of 60.0 kg, is riding at 25.0 m/s in her sports car when she must suddenly slam on the brakes to avoid hitting a dog crossing the road.
She is wearing her seatbelt, which brings her body to a stop in 0.400 sec.
a. What average force did the seatbelt exert on her?
I
b. If she had not been wearing her seatbelt, and the windshield had stopped
her head in 0.001 sec, what average force would the windshield have
exerted on her?
c. How many times greater is the stopping force of the windshield than the
seatbelt?