Eli5 Why is force equal to mass multiplied by acceleration and not speed ?

Question

If a car moves consistently at 80 kmh and it weighs at 600kg, is it not generating any force? since you know, a=0, am I stupid or is Newton ?

In: 13

Answer 1

You are sitting in the car at constant speed and you wont feel the force of the car against you either. The force you would feel at a crash is actually the deceleration (negative acceleration)