Before discussing AC motors it is necessary to understand some of the basic terminology associated with motor operation. Many of these terms are familiar to us in some other context. Later in the course we will see how these terms apply to AC motors.
Force in simple terms, a force is a push or a pull. Force may be caused by electromagnetism, gravity, or a combination of physical means. Net force is the vector sum of all forces that act on an object, including friction and gravity. When forces are aplplied in the same direction, they are added. Fore example, if two 10 pound forces are applied in the same direction, they are added. For example, if two 10 pound forces are applied in the same direction the net force would be 20 pounds.
