Two identical cars, each traveling at 16 m/s, slam into a concrete wall and come to rest. In car A the air bag does not deploy and the driver hits the steering wheel; in car B the driver contacts the deployed air bag. (a) Is the impulse delivered by the steering wheel to driver A greater than, less than, or equal to the impulse delivered by the air bag to driver B?
(b) Choose the best explanation from among the following:
I. The larger force delivered by the steering wheel delivers a greater impulse.
II. The longer interaction time with the air bag delivers a greater impulse.
III. The change in momentum of each driver is the same.