It's a neat piece of science art, and it also tells us something interesting. The arrows show us that the force on the skateboard is constantly changing, both in magnitude as well as in direction. Now the force of gravity obviously isn't changing, so the reason that these force arrows are shrinking and growing and tumbling around is that the skater is changing how their feet pushes and pulls against the board. By applying a variable force that changes both in strength and direction, they're steering the board.
Choosing a skateboard deck is a great place to start when building a complete skateboard. Unless you have experience riding a shaped board - something a little more retro or unusual, we recommend you start with a popsicle shape. CCS carries over 60 different skateboard deck brands that sell this popular popsicle shape. If you have questions on what size you should ride or have any other questions about building a complete, we recommend you check out our Skateboard Buyer’s Guide. Here, you’ll find helpful how-to’s for choosing a skateboard decks, skateboard trucks, skateboard wheels, skateboard bearings, and skateboard components. This guide explains every part of a skateboard and helps you choose which sizes and styles to best suit your needs.
To get higher ollies, I would suggesting resting your back foot on the very end of the tail and the front foot in the middle of the deck to allow for more slide. Popping as hard as you can and catching your board in the groove of the nose with you ankle practically resting in the groove will level the board out in the air. after this initial movement slide you feet back to the bolts on the tail and nose to ensure a clean landing.