Respuesta :
i think it would be newton's first law of motion
Newton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.
please mark as brainliest :) hope i helped
Answer: First Law
Explanation:
When you are sitting in the moving car, you are ina moving system, but when the car stops, your body (that is inside the car) does not stop with it, this is because the first law, that says that an object will remain still or in constant motion until a force is applied over it.
This is why your body will continue with constant velocity after the car stops, and the seat belt keeps you in place as if you are another piece of the car that also stops with it.