Question

A 50.0 kg driver is riding at 35.0 m/s in her red sports car when she must suddenly slam on the brakes to avoid

hitting a deer crossing the road. She strikes the air bag, which brings her body to a stop in 0.500 s.
What average force does the seat belt exert on her?

Answer 1

3500N

Step-by-step explanation:

Given parameters:

Mass of driver = 50kg

Speed = 35m/s

Time = 0.5s

Unknown:

Average force the seat belt exerts on her = ?

Solution:

The average force the seat belt exerts on her can be deduced from Newton's second law of motion.

F = mass x acceleration

So;

F = mass x
`(change in velocity )/(time)`

F = 50 x
`(35)/(0.5)` = 3500N