a) The law of inertia.
What is law of inertia?
Law of inertia, also called Newton's first law,
It states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.
As per the question,
Marcy is driving her new car. She slams on the brakes to avoid hitting a squirrel. Her seatbelt acts as a force to stop her body from moving forward out the windshield.
Here,
Inertia is the primary reason you don't go flying out of the vehicle during an accident.
The inertia keeps the bodies moving simultaneously until the seat belts stop their motion.
As long as the seat belts are working well, your body will not be thrown out of the vehicle even if the collision is hard.
Therefore,
It is an example of the law of inertia.
Learn more about law of inertia here:
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