Use what you know about inertia to explain why you feel pressed back into the seat of a car when it accelerates?

Use what you know about inertia to explain why you feel pressed back into the seat of a car when it accelerates?
We know one of the types of inertia: A body at rest tends to stay at rest.

So there you are in the carseat at rest. When the cars zooms forward, your body tends to stay where it was, but the car through the seat pushes you forward. To your brain this is the same feeling as if you pushed back into a soft chair, the the fact is, the "chair" (carseat) is pushing you forward.
well by using inertia aka inactiveness the reason you are beeing pushed into the seat because you are in the seat and your body is not traveling into any direction you are stationary. There for vehicle does the movement and when it does you body want to travel in the opposite direction of it. So braking you go forward, accel backward, left you swing right and right you swing left. Its just how our body is wanting to remain stationary.
When you punch the pedal the vehicle begins to move. You, however, essentially remain at rest until the vehicle "picks you up" and carries you...same thing only backwards for stopping...'An object at rest remains at rest until acted upon by an outside force'...'An object in motion remains in motion until...ditto'.