3
QuizMultiple Choice

Momentum — Quiz

Question 3 • Physical Science

In a car, how does an air bag minimize the force acting on a person during a collision?

Answer
A
It increases the change in momentum of the person.
B
It decreases the change in momentum of the person.
C
It decreases the time it takes for the person to stop.
D
It increases the time it takes for the person to stop.

Explanation

During a collision, the person’s momentum changes as they come to a stop. The impulse relationship says that force equals the change in momentum divided by the time over which it occurs. An air bag increases the time it takes the person to stop, so the average force is smaller. The correct choice is “It increases the time it takes for the person to stop.”

AI-written and checked against the verified answer.

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