Newton's First Law, which is sometimes called the law of inertia, helps us understand why wearing seatbelts in cars is so important. Let’s break it down:

• What is Inertia? An object that is moving will keep moving, and an object that is still will stay still unless something else makes it change. This means that if you're driving in a car, your body wants to keep moving forward at the same speed, even if the car stops.

• What Happens in a Crash? If you suddenly slam on the brakes or hit something, your car will come to a stop, but your body wants to keep going. Without a seatbelt, you could be thrown forward and could hit the steering wheel or the windshield.

• How Seatbelts Help Wearing a seatbelt is like using a safety tool that acts like that “outside force.” It keeps you in your seat and helps stop you safely during a sudden stop or crash. This way, it lowers the chances of getting seriously hurt.

So, wearing a seatbelt isn’t just a smart choice; it’s a really important safety rule that connects perfectly with the ideas in Newton's First Law.