Question on: JSS2 Basic technology - Simple Machines

Gears are wheels with teeth that interlock to transmit motion and force between different parts of a machine. They can change the direction of movement, increase speed, or increase force. For example, in bicycles, gears help riders adjust the effort needed to pedal on different terrains. In clocks, gears regulate the movement of the hands, ensuring accurate timekeeping. Car transmissions also use gears to change the speed and torque of the engine to the wheels.

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