Correct Option
A simple machine is a mechanical device designed to change the magnitude or direction of an applied force, thereby offering a mechanical advantage. According to the principle of work, the total amount of work done is the product of force and the distance over which it is applied (Work = Force × Distance). A simple machine does not reduce the total work required to achieve a task. Instead, it allows the same amount of work to be performed by applying a smaller force over a proportionally larger distance. This enables a person to accomplish the task with lesser effort or force.
Incorrect Options
Option (a) is incorrect because a simple machine does not reduce the total amount of work done. It only alters the way force and distance are applied to achieve the same work output.
Option (c) is incorrect. The primary function of a simple machine is to modify the force or direction of work, not to inherently change the speed or time taken to complete the work. While it might indirectly affect the pace, it is not its defining characteristic.
Option (d) is incorrect. The core purpose of a simple machine is to provide a mechanical advantage by reducing the required force or changing its direction, not primarily to enable work to be done "much faster."