How do Formula 1 Racers brake?

May be...

ABS is banned in F1 so entering a corner the drivers use cadence braking, they brake in a straight line until the wheel is just about to lock then release the pressure slightly then reapply pressure.

I used to play alot of driving games and thought I'd found a bug in the games where I kept braking a small amount around the corner and found it helped my lap times.I was surprised when I saw F1 drivers telemetry doing this.

And yes I know games are nothing like the real thing.

With their LEFT foot on a brake pedal.

There are many different techniques to braking. Trail braking is probably one of the most difficult braking techniques any driver can master. Trail braking is where the brakes are used beyond the entrance of a corner, and are gradually released up to the point of apex, or in some cases, through the apex of the corner. To understand how difficult that is to judge, I use the percentage method.

Imagine that all your tires have a limit in which they produce 100% of their traction. When a car enters a corner, the driver is typically using 100% of the tires traction to slow the car down. As the driver begins to rotate the wheel, he must also decrease the amount of brake input he is putting into the car because now a percentage of the tires grip is being use to move the car laterally. Releasing the brake to much takes the load of the front of the car, and can often times make the car understeer. At the same time, to much brake can lock the fronts, which also causes understeer. F1 runs more rearward brake than almost any other motor sport, so in most causes when you see a driver over brake into a corner, the car becomes unstable.

If you want to see the action first hand, watch the following video. http://www.youtube.com/watch?v=WtDRGNnTQ...

If you want to see trail braking at it's finest, check the following video. http://www.youtube.com/watch?v=WJNjDaZw5...

They move their left foot about half an inch.

Left footed braking, They brake hard to save time but in the same time they can't push it to avoid Brake locking and over-heating of the brakes.
Also a usual technique is trail braking where the driver gradually releases the brakes while gradually accelerating out of the corner which is valuable in the terms of lap times and to avoid under-steer.
The driver can adjust his braking balance as ratios front : back throughout the race depending on fuel loads and weather conditions.abyess