There are a few ways that high speed ski lifts can slow down. One way is by using a friction brake. This type of brake is located at the top of the lift and uses pads that rub against the moving parts of the lift to slow it down. Another way to slow down a high speed ski lift is by using a hydraulic brake. This type of brake uses fluid pressure to create resistance and slows the lift down. Finally, some high speed ski lifts use an electromagnetic brake. This type of brake uses magnets to create resistance and slows the lift down.