Propeller

A propeller is a device with blades attached to a central hub that spins rapidly to generate thrust, moving a vehicle like an aircraft or boat forward. When the blades spin, they push air or water backward, creating a forward force due to Newton's third law—action and reaction. The design and angle of the blades determine how efficiently the propeller converts rotational energy into propulsion. Propellers are essential for achieving controlled movement, providing the necessary force to overcome resistance and propel vehicles through air or water.