Where are gears used?

* Automotive transmissions: Gears are used to change the speed and direction of rotation of the driveshaft.

* Industrial machinery: Gears are used to power a variety of machines, such as conveyor belts, pumps, and compressors.

* Clocks and watches: Gears are used to keep time.

* Toys: Gears are used to create movement in toys, such as cars, trains, and robots.

* Medical devices: Gears are used in a variety of medical devices, such as surgical robots and pacemakers.

Gears are an essential component of many different types of machines. They allow for the efficient transfer of power and motion, and they can be used to change the speed, direction, and torque of a rotating shaft.