To avoid creating a sloped or otherwise uneven surface, keep the file level as you push it.

From these a design using many sloped surfaces was chosen to keep the weight low.

For example, static friction can prevent an object from sliding down a sloped surface.

On the broad sloped surface going down to the Lauter hollow stood the commercial buildings.

Place the level on the sloped surface in the direction you wish to measure.

While the level is in this position, measure the distance between the end of the level and the sloped surface below.

Clawing at the sloped surface, he was finally able to stop his precipitous slide.

If a character is knocked down a sloped surface, their legs and arms often pass through the environment as they get up.

What I would recommend is an experiment - if you can get a slightly sloped surface to race your car down, and time it carefully.

They would make it safer and easier to move quickly across those sloped surfaces.