Newton's Second Law
Newton's Second Law of Motion is the acceleration of an object by a force is inversely proportional to the force. For example, that say like a person puts the same amount of force on two balls. They push the first ball which has a mass of 2 pounds, then they push the second ball which has a mass of 3 pounds. The ball that would roll further would be the first ball because less mass = greater acceleration, more mass = less acceleration. To figure out how much force is applied to an object you need to understand that the greater the force applied to an object the greater the acceleration. The less force applied to an object the less acceleration.
Force = Mass x Acceleration!
What do seat belts have to do with any of this?
Seat belts relate to Newton's Second Law of Motion because when your driving in a moving vehicle and then you wreck or immediately stop, your body wants to accelerate forward at how fast the car was going. The seat belt can pull you back to the seat when it happens instead of flying forward into the dashboard or windshield. For example, your in a sedan on an icy highway going 45 mph then all of a sudden you lose control and slide head first into a guardrail. The seat belt can stop you from accelerating out of your seat and possibly out of your car. Wearing a seat belt is very important involving this Law of Motion and when you think about buckling up, think about this law.