These are materials which allow the
production or use of mechanical energy. Motors are part of a large
class of componants called actuators. An actuator uses heat, electricity,
compressed air, or some other form of energy to move objects in space.
The thing being moved by the actuator is called the load. Only rarely is the load
attached directly to the actuator. Usually there are belts, pulleys,
gears, bearings, and/or axles giving physical support to the load and
connecting it to the actuator. The general name for the devices in
between the actuator and the load is power
transmission componants.
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