What is the name of a flat surface set at an angle that helps lift objects?

The name of a flat surface set at an angle that helps lift objects is referred to as an inclined plane. An inclined plane is a simple machine that allows for the efficient movement of objects from a lower to a higher elevation with less force than lifting them directly vertically. By spreading the effort required to lift an object over a longer distance, it reduces the amount of input force needed.

For example, when you push a heavy box up a ramp, you apply force along the length of the ramp instead of directly lifting it, which makes the task easier. The mechanical advantage gained is a key principle of how inclined planes function, and they are widely used in various applications, such as wheelchair ramps, slides, and loading docks.

While the terms "platform," "ramp," and "elevation board" might refer to surfaces or structures associated with lifting or moving objects, they do not specifically describe the angled surface that facilitates this lifting in the way "inclined plane" does.