A gear system is a mechanical arrangement that uses gears to transmit motion and force between different parts of a machine. Gears are circular components with teeth that interlock, allowing them to transfer rotational energy efficiently. By changing the size and arrangement of gears, a gear system can alter speed, torque, and direction of movement, making it essential in various applications, from simple clocks to complex vehicles. In a gear system, the primary components include the drive gear, which is powered by an external force, and the driven gear, which receives the motion. The ratio of the sizes of these gears determines how the system operates, influencing factors like speed and power output. Gear systems are widely used in machinery, bicycles, and automotive engines.