A stunt person jumps from the roof of a tall building, but no injury occurs because the person lands on a large, air-filled bag. Which one of the following best describes why no injury occurs?
A)The bag provides the necessary force to stop the person.
B)The bag reduces the impulse to the person.
C)The bag increases the amount of time the force acts on the person and reduces the change in momentum.
D)The bag decreases the amount of time during which the momentum is changing and reduces the average force on the person.
E)The bag increases the amount of time during which the momentum is changing and reduces the average force on the person.

Question

Quizplus · Accepted Answer

When the person lands on the air-filled bag, the bag compresses and slows down the person's momentum gradually over an extended period of time. This increases the amount of time during which the momentum is changing, and since force is the rate of change of momentum, the average force on the person is reduced. This means that the person experiences less force and is less likely to get injured. Therefore, option E - "The bag increases the amount of time during which the momentum is changing and reduces the average force on the person" - is the correct choice.

A Stunt Person Jumps from the Roof of a Tall