What if I were on a roller coaster and the safety harness broke?
A roller coaster loop-the-loop is a sort of centrifuge. As you approach the loop, your velocity is straight ahead of you. But the track keeps the coaster car, and therefore your body, from traveling along this straight path. The car starts to turn upward and your velocity is trying to carry you straight ahead. The force of your inertia pushes you into the car floor. This creates a sort of false gravity pulling you toward the bottom of the car when you’re upside down. You need a safety harness for security, but in most loop-the-loops, you would stay in the car whether you had a harness or not. As you move around the loop, the net force acting on your body is constantly changing. At the very bottom of the loop, the acceleration force is pushing you down in the same direction as gravity. Since both forces push you in the same direction, you feel especia
