Explain, in terms of impulse and momentum, how airbags help avoid injury in a car crash?

Explanation:

Impulse is the change in momentum.  It is also equal to the average force times the change in time.

J = Δp

F Δt = m Δv

The change in momentum is a fixed number; your mass, initial velocity, and final velocity are constant.

F Δt = k

So force and time are inversely proportional.  What this means is, we can either have a large force over a short period of time, or a small force over a long period of time.

Obviously, we want a small force over a long period of time.  Without airbags, your head would hit the steering wheel very quickly.  With airbags, your head has time to decelerate, so there's less force.

the force required to move the cart is divided by three or 33.33 n.