Question

During a collision, an 78-kilogram driver of a car moving at 32 meters per second is brought to rest by an inflating air bag in 1.4 seconds. The magnitude of the force exerted on the driver by the air bag is approximately N. I could really use the help thanks

Answer 1

1800 N

Step-by-step explanation:

There are two ways you can solve this. Newton's second law, or impulse.

Using Newton's second law:

F = ma

F = m Δv / Δt

F = (78 kg) (0 m/s − 32 m/s) / (1.4 s)

F ≈ -1800 N

Impulse = change in momentum

F Δt = m Δv

F (1.4 s) = (78 kg) (0 m/s − 32 m/s)

F ≈ -1800 N

The magnitude of the force (rounded to two significant figures) is 1800 N.