Why do trucks have bigger brakes?

[phyzzle]

That doesn't make sense from what we have been discussing. If the car is at rest then the force is 0 as you have correctly pointed out multiple times. It cannot be both 0 and the maximum.

In order for the force to be at f max you would have to be braking as hard as possible using ideal antilock brakes.

I am not sure what we are talking about anymore. You asked:

"Why? There is only one equation that I know of which involves the coefficient of static friction and it allows for a range of forces for a constant coefficient. Are you aware of any formula other than fs≤μsfN which uses μs? If so, please post it with a reference."

and I responded with another formula, and it's reference. I do not think I ever implied that the static frictional force can be both 0 and the maximum, if I did I certainly did not intend to.
I came here with an honest question about something I did not understand, and thanks to your help and that of others I think I have clarity now. If your intention was to help my understanding you certainly did that, so...thank you.

 

[Dale]

You are welcome. Sorry if my last comment caused any confusion. I was just answering that small question I quoted. The force can be f max under certain conditions, but not those discussed here.