Certainly, all four wheel brakes are used in normal stopping. However, the lions share of the stopping power is from the front brakes, yes.
because disc brakes provide more uniform torque throughout than drum brakes during braking..
Disc brakes are actually preferred on vehicles because they cool more quickly then drum brakes, which allows them to be more effective at braking. However, many cars have rear drum brakes because they are cheaper and easier to replace, and as the rear brakes actually do not have much of an effect on overall braking, it is not necessary to have disc brakes.
There is a "proportioning valve" that relieves some pressure during heavy braking.
Braking distance is usually measured by how fast you can stop at 60mph, 60-0, the make of a car is the factor of the stopping distance, each car varies. Your car can have disc brakes or drum brakes or both. Disc brakes are more effective than drum brakes. But braking distance is usually showed by how many feet it takes to stop from 60mph
It has a superior design that features a greater braking force.
Many, but not all. They cost less and the energy from braking the spinning drum is funneled into the car's battery.
worn out pad, warped rotor, broken brake caliper (or cracked drum, if drum brakes)
On the 4WD SR5 truck, front brakes are disc, and rear brakes are drum.
Duo-servo type drum brakes are an improved version of twin leading construction, where two brake shoes are linked. When a primary side leading shoe is pressed against the drum by the wheel cylinder, the force that makes it rotate together with the drum wedges the secondary side leading shoe into the drum to achieve braking action. This type of drum brake provides strong braking for both forward and reverse movement. It is used in commercial vehicles that require especially large braking forces.
Yes. Energy generated during regenerative braking recharges the traction battery and is later used to power the car. The Prius also has friction brakes (disk/drum), which are used at very low speeds or for hard braking. And it's braking, not breaking.
Disc brakes are more powerful, but it's easier to add a parking brake to a drum brake. So the front wheels often gets disc brakes, as they do most of the braking anyway, and the rears get drum brakes.
Periodic front disc brake adjustment is needed to prevent rotor warpage