Why don't all car brakes screech?

I know that they should only screech when they are worn out and need to be replaced but I'm just curious as to why they don't ALWAYS screech. The brake is metal and the rotor is metal. And when you rub metal together you get a screeching noise. So why not here? Even if the brake isn't made out of metal, it's still a hard material. What gives?

it doesnt want to run longer than 20 min or so it shuts off like it stopped getting gas and wont start again until it is cold
it is a 1994 chevy k 1500 350 5.7 liter 4wd
so far ive replaced
fuel filter
fuel pump
fuel pressure relay
coolant temperature sensor
ignition coil
problems that may be related
it bogs hard and tries to die after going through big puddles
months before this issue i suspect someone put sugar in the tanks
weeks before this issue i replaced the intake gasket and cleaned out a lot of engine gunk

A tow truck is connected to a 1500-kg car by a cable that makes a 30∘ angle to the horizontal.?

If the truck accelerates at 0.61m/s2 , what's the magnitude of the cable tension? Neglect friction and the cable's mass

they are heavy, complex and gas hogs, and are not really suitable for most sports cars. For example, the E Type Jaguar (XKE as some call it), went from an inline 6 to a V-12, and it completely changed the character of the car---and not for the better either.

A V-12 is more suited to a large limo or a powerful heavy GT car--not for a 2-passenger light car that needs to scoot around turns quickly and easily.

Besides, American car makers made a number of V-12s in the 1930s, and they were not particularly popular.

Increasing the number of cylinders does not automatically translates linearly into proportional power.

Whatever a V-12 can do, a V-8 can do.

You need to have someone plug in a code reader to tell you what's going on. Sometimes places like Autozone or OReilly Auto Parts will lend you one for free.

Generally speaking, you should be okay for 30 miles unless the check engine light is actually blinking----in that case, you may be grounded.