Other forces used in skateboarding
friction
gravity
motion
acceleration.
The Board slide is when the wheelbase of the skateboard deck makes contact and slides along a ledge, coping, or rail.
The nose and the tail of the board can also be slid on
The rider does an ollie high enough so he/she can land on the surface to slide.
When the rider is locked in to the slide .
He/she has to overcome friction, which slows the rider down.
Some surfaces create more friction than that of others.
Sliding a slick metal pole will have a lot less friction than an old piece of wood, therefore sliding better.
Waxing a curb or piece of wood grealty increases the rate of momentum that can be gathered and therefore overcomes friction with a bit more ease
Once the rider has overcome the first bit of friction, and is now sliding ,it gets easier.
Once locked on , he/she has momentum.
Newton's law declares that now, the body wants to keep going forward and sliding.
To get out of the slide, the rider simply turns, and absorbs the impact upon landing by bending at the knee's.