What is an input force? a.) the force a simple machine applies to an object b.) the net force on a system c.) the applied force on a system d.) the force a person applies to a simple machine you if you answer this! : )

Option (D) is the correct answer.

Explanation:

When a force is applied by a person to a system then this force is known as input force.

It is also known as initial force that needs to be applied in order to start a machine.

For example, when a piston in a system is pressed inwards by a person then an input force is applied to the system.

Thus, we can conclude that an input force the force a person applies to a simple machine.

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