Final answer:
A simple machine offers an advantage by reducing the input force required to perform a task.
Step-by-step explanation:
A simple machine offers an advantage by reducing the amount of force that needs to be applied to perform a task. It does this by increasing the distance over which the force is applied, which results in a smaller input force requirement. The ratio of the output force to the input force for any simple machine is called its mechanical advantage (MA).
For example, a lever is a simple machine that uses a pivot point called a fulcrum to amplify the force applied. By positioning the fulcrum closer to the load, we can exert a smaller force to lift a heavier object. This reduces the input force required while increasing the distance over which we apply the force, offering an advantage.