5 MECHANISMS THAT CONTROL MOTION

5.1. Direction control: Ratchets

 A ratchet is a mechanism that controls the direction of motion. It allows motion in one direction, but not in the other, as you can use the picture.

5.2. Speed reduction: Brakes

Brakes use friction to reduce speed. They are activated by certain levers. The lever transmits force to an output receptor, which puts pressure on the wheel.

 The types of brakes are:

Disc brakes:

 

Band brake:

Drum brake: