Why does stopping a vehicle you’re in cause you to jerk forward, even though motion is supposed to be relative (and the vehicle isn’t moving from your “physics” perspective)?
In: Physics
Actually it is moving from your perspective, the act of you jerking forward is movement relative between you and the car. This is caused by the cars acceleration (or deceleration in this case) a force is applied to the car(breaks) and is slowing the car down but since you are not structurally connected to the car there is no force being applied to you until the seatbelt, as well as friction between you and the seat, applies a force on you slowing you down.
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