You can burn your whole leg” warns flight attendant. "Friction against the surface of the slide or chute can cause burns ...

Friction is a force between two surfaces that are sliding, or trying to slide, across each other. For example, when you try to push a book along the floor, friction makes this difficult.

And the less friction there is the easier two objects slide across each other? So, just to be sure I’ve got this… Smoother surfaces means you go faster because there’s less friction between ...