How does a simple machine generally affect the work done on an object?

A simple machine, such as a lever, pulley, or inclined plane, is designed to make work easier by allowing the user to apply a smaller force over a greater distance. While it enables the user to exert less effort, the work done on the object itself remains unchanged.

The work done is defined as the product of force and the distance over which that force is applied. In an ideal situation (without considering friction or other losses), the work input into the machine is equal to the work output. This means that if you reduce the input force by increasing the distance over which that force is applied, the total work done does not change. The trade-off is essentially between the force applied and the distance moved; while you can reduce the force, you must also increase the distance to complete the same amount of work.

Thus, the correct answer highlights that a simple machine aids in reducing the effort needed to do the same amount of work, maintaining the total work performed.