Final answer:
An input force is the force applied to a system or object to produce a desired output, such as opening a door by pushing it. Net force is the overall result of all forces acting on an object, while an applied force is exerted on an object by an external source.
Explanation:
Input force is the force applied to a system or object to produce a desired output. It is the force that initiates a process or action. For example, when you push a door to open it, the force exerted by your hand is the input force.
Net force is the overall result of all forces acting on an object. Applied force is a force that is exerted on an object by an external source, like a person pushing a box.
In the context of simple machines, the force applied by the machine to move or lift an object is often referred to as the input force.
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