PRELIMINARY QUESTIONS 1. In a car collision, the driver\'s body must change spee

Question

PRELIMINARY QUESTIONS 1. In a car collision, the driver's body must change speed from a high value to zero. This is true whether or not an airbag is used, so why use an airbag? How does it reduce injuries? Physics with Vernier 19-1 Experiment 19 You want to close an open door by throwing either a 400 g lump of clay or a 400 g rubber ball toward it. You can throw either object with the same speed, but they are different in that the rubber ball bounces off the door while the clay just sticks to the door. Which projectile will apply the larger impulse to the door and be more likely to close it? 2.

Explanation / Answer

A.
The basic idea is that the airbag inflates as soon as the car starts to slow down in an accident and deflates as your head presses against it. That's important: if the bag didn't deflate, your head would just bounce back off it and you'd be no better off.
Air bags increases time for momentum changes or time to decrease speed to zero, by which value of firce decreases.

B.
Rubber ball bounces back hence having large change in momentum, so it will causes more Impulse.
Impulse basically equal to change in momentum.. as change in momentum increases Impulse also increases.

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