Presentation on theme: "Longboarding Physics Alex Briestensky and J.P. Hajjar"— Presentation transcript:
1Longboarding Physics Alex Briestensky and J.P. Hajjar Science Fair ProjectLongboardingPhysicsAlex Briestensky and J.P. Hajjar
2Statement of the Problem When we change the size of wheels on a longboard, which wheels will go faster? (65mm, 69mm, or 75mm)
3Project OverviewWe did end up figuring out that our hypothesis was wrong, but over all our project turned out really good and we had a great time doing it. We now know that the size of wheels does really affect the speed of the longboard. We think that we should try to see if the softness of the wheels affect the speed too.
4ResearchWe learned that the bearings also affect the speed because if they aren’t clean on one run and they are on the next, then it can make a difference in how fast the wheels go.Then we found out that some wheels are made for carving and others are made for speed.Some wheels are softer than others.
5Variables Independent Variable-size of wheels. (65mm, 69mm, and 75mm) Dependent Variable-amount of speedControl Variable-board used (with Gulwing trucks, Sector 9 deck, and Bone Red bearings.
6HypothesisIf we used three different sized wheels on a longboard, then the wheel that are the smallest will get the most speed, because there is less friction.
7Materials Longboard deck (32 in.) Trucks (drop through) Bearings (Bone Reds)Longboard wheels (fat free 65mm, in heat 75mm, and sector 9 69mm)HelmetWrist padsWrench (tighten wheels)Metal stick (take out bearings)
8Procedure Plan out experiment Get bearings (put inside wheel) Get wheels (tighten wheels on trucks with wrench)Put on a helmetPut on padsGo to starting pointPush of 3 times as you start (start the timer)Go as fast as possible by crouching down and maintaining your balanceRide through finish line (stop timer)Collect data
10Data/Observations (Analyzes) Quantitative Observation: The In Heat Orangatang wheels had the best time of 8.22Qualitative Observation: The Sector 9 wheels were not very fast.
11Conclusion We discovered that our hypothesis was incorrect, the wheels that were the largest and heaviest went the fastest.(Orangatang In Heat (75mm)We also found out that the wheels that came with the board(sector 9) were not made for speed, they’re made for carvingthat’s why they didn’t go as fast as the others.
12Applications and Recommendations We suggest you do a couple of practice runs before every setof wheels to get a feel for how they ride.We would also like to suggest you make sure your timing isperfect, so that none of your results are incorrect.Make sure all the wheels used are tightened at the exact sameamount.Make sure the bearings are clean for every run.
13Possible Experimental Errors When we used a timer, we could have been off when we started orfinished.If the rider put more force on one push, and put less on the next.If the rider didn’t maintain balance and stay as low as the othertimes.If the bearings where cleaner on the wheels that were tested first,then the ones after wouldn’t go as fast.
14Works Cited"Longboard Wheels." Longboard Wheels. Web. 12 May <http://www.longboardwheels.net/>. The Longboard Store. Web. 12 May <http://thelongboardstore.com/>. "Longboarding Info - Longboard Skateboarding - How to Ride a Longboard, Tricks, Reviews, News, More." Skateboarding | Skateboard Trick Tips, Pro Skaters, Skateboard Reviews, Skateboard Help and More about Skateboarding! Web. 12 May <http://skateboard.about.com/od/boardscience/Longboarding_Info. htm>.