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Question:

phyiscs of skateboard wheel?

i have a few questions about how the size of a skate board wheel affects the speed of the skateboard.what are the advantages of a large wheel?what are the advantages of a small wheel?how is friction realated to skateboard wheels?how does the size affect the amount of friction in a skateboard wheel?Why do large wheels absorb more of the bumps on a rough surface?and if you have any sources of were u got themthank you!!

Answer:

An outside plug is only a temporary measure to get you home. If the tyre is removed and plugged properly from the inside, the plug will last the life of the tyre.
It is dependable enough to use as a road-side fix to get back home or to a M/C shop for a replacement tire. It should not be used for long or at high speeds.
If the tire, rim and bike are rated to run a tubeless tire than you run a big risk by using a plug to patch it and a risk by putting a tube in it, so you're sort of screwed both ways (first you got nailed than you got screwed). Also, there were a few guys that I used to race against that would plug a tubeless tire from both the outside and than do another patch on the inside of the tire, but they only did that if it was a really new tire and didn't feel like wasting the tread.
If you want some good wheels choose Spitfire. They are a softer material and make your ride smoother!
1) what are the advantages of a large wheel? It rolls more easily over cracks and bumps. Larger contact area, lower contact pressure on the ground, less deformity of the wheel, lower rolling resistance. 2) what are the advantages of a small wheel? Lower inertia, so less gyroscopic moment and faster turning response. Smaller turning radius. Will wear out faster also, since the circumference is smaller and spends more time touching the ground. 3) how is friction realated to skateboard wheels? The larger the wheel, the larger the contact area on the ground. So, the normal force is distributed over a wider area, and is therefore lower at any one location. The friction (rolling resistance is lower). But, the air resistance of a larger wheel is also larger. 4) how does the size affect the amount of friction in a skateboard wheel? The smaller the wheel, the greater the rolling resistance, all other factors remaining equal. This is because the force of the ground on the wheel is applied over a smaller area. So, the contact pressure is higher and causes more local deformation of the plastic. Same principle as riding a bicycle on hard vs. soft tires. Takes much more effort for the soft tires, since they are much less 'round' at the point of contact than a hard tire. 5) Why do large wheels absorb more of the bumps on a rough surface? Larger contact area. Its sort of like walkign through the snow on snowshoes vs. sandals. The snowshoes spread the force out over a bigger area and so the wheel is less affected by small defects. Also, the rolling resistance is related to the relationship of the wheel radius to teh size of the bumps on a rough surface. A large wheel will roll over a cobblestone road much more easily than a rollerskate will. and if you have any sources of were u got them My head. Hope this helps, -Guru

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