Levers

A lever is a rigid bar that turns around the fulcrum. Each force produce Torque.

Torque=FxD

Classes of levers
Class 1: The fulcrum is between the force and the resistance
Class 2: The resistant is between the fulcrum and the force
Class 3: The force is between the fulcrum and the resistance

Brake levers
Bicycle brakes decrease speed. we control them with levers on the handlebar.


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