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

1800 N

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.

second mirror gathers light from a faraway object and reflects it to another mirror. - a.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.