the wheels, ya.
Gravity, friction, or wind drag.
Actually, waxing skis increases friction. Wax is not slippery. If you wanted less friction you could oil your skis.
friction
When you increase your velocity on a skateboard it is harder to stop because of momentum.
When you increase your velocity on a skateboard it is harder to stop because of momentum.
When you increase your velocity on a skateboard it is harder to stop because of momentum.
When you increase your velocity on a skateboard it is harder to stop because of momentum.
the friction between the wheels and the surface of the ground affect the speed of the skateboard. fo instance if you ride the skateboard on a smooth surface (with less friction) the skateboard will go faster.
Lubrication to reduce friction. To increase friction step on the brakes.
by slaiding friction increase
waxing
Waxing.