How often does a car stop at a stop?

because is the law... to keep people safe.

Disc Brakes: As you step on the brake pedal fluid (which cannot be compressed) is forced from the master cylinder to the individual brake calipers forcing them to apply equal pressure to the piston...

circulating fan is probably not working when car is moving it works with outside airflow, check for blown fuse

Your wheels must come to a stop, or in other words stop rotating. Otherwise its called a "rolling stop" and you can be ticketed.

bad idle, bad timing, needs tune up , etc.