You should always wear your seatbelt just in case the car comes to an abrupt stop. The seatbelt will hold you in place so that your body does not continue moving when the car stops.

What property of matter will keep your body in motion when the car comes to a halt?

Which of Newton's three laws does this example most closely represent?

The property of matter that will keep your body in motion when the car comes to a halt is inertia. Inertia is the tendency of an object to resist changes in its motion.

This example most closely represents Newton's First Law of Motion, also known as the law of inertia. This law states that an object at rest will stay at rest and an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an external force. In this case, the external force is the car coming to a halt, but your body will continue moving due to its inertia until the seatbelt stops it.