SIFT Mechanical Comprehension Practice Test

An inclined plane makes lifting an object easier by allowing force to be applied over a longer distance. This principle is rooted in the concept of mechanical advantage, which describes how certain simple machines can distribute the work required to lift something over a longer path, rather than exerting a larger force over a shorter straight-up distance.

When an object is raised using an inclined plane, the force needed to lift it vertically is reduced because the distance over which the work is done is extended along the slope of the incline. Instead of lifting the object straight up, you move it along the incline, which means you can use a smaller force. Thus, while you are still doing the same amount of work (force times distance), the inclined plane changes the way that work is done, making the task of lifting an object easier and more efficient.

By applying force over this longer distance along the slope, it becomes manageable to move heavier objects than would be possible if lifting straight up. This mechanical advantage is why simple machines like inclined planes are useful in various applications, such as loading ramps and hills for transportation.