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

Because speed is constant if no force is being applied. A force of zero doesn’t make a thing suddenly stop… And if you think it does, you should consider “stopped, relative to what?“