I don't know if this was already adressed, but I saw in my book the term of Non-existent force and until today I didn't get what it is referring to...why it's non-existent. Assuming you're in a car with linear motion, constant velocity...zero acceleration. You hit your break as hard as you can. You will be pushed forward and collide with the steering weel. Question: Where do you get the force that leads to you moving in report to the steering weel if you were at equilibrium with the rest of the car and the brake affects the car, not you? The 5-step process and Newton's 3 laws make no mention of this. The more i'm trying to apply them the more i feel like an idiot. Any help? Some info...whatever?