Car seat belts tighten during sudden braking. Which statement best explains their safety function?
a) They eliminate friction between the passenger and seat, preventing sliding during braking.
b) They apply an external force that rapidly decreases the passenger’s forward motion.
c) They increase the passenger’s inertia so that the passenger decelerates with the car.
d) They increase the time required for the passenger to stop, so the stopping force becomes larger.