By Ali Ray
How it's Played
Aerialists sometimes wrap their skis in more fiberglass to reduce friction.
Skis are made with medal on the side to grip onto the snow so they don't crash.
Epoxy makes skis smooth Another word for epoxy is polymer, which is a fancy name for plastic. They also coat their skis in wax to reduce friction.
The Science of Aerial Skiers
Push off is very important, because when they are in the air, they can't change their angular momentum.
Their moment of inertia is when they move their arms and legs in and out to "steer" them in the air, because a bad landing is bad.
The cool thing is that cats use it, too! That's why they always land on all four of their legs. They have special moments to do it.