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The Physics in snowboarding

physic project for 3rd quarter

Chloe R

on 19 February 2013

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Transcript of The Physics in snowboarding

The Physics Of Snowboarding The History Description Rules in the Olympics The Physics involved Who Started It? This sport is a winter sport.
The basic movements depend on how much experience the person has. Beginners will slide down the hill on the heel edge meaning, putting pressure on the end of the board where your heels are. The beginners may also stay on the trails that are less steep and have less obstacles. Intermediate groups may use the nose end. They may also start going off of coffin boxes and or rails. They will tend to be on the trails that are a little steeper and or have more obstacles. Pros will be able to do all these maneuvers they may also be able land complicated jumps and tricks. They will most likely be on the harder runs such as black diamonds. The best way to learn this sport is to get lessons. Two minute rule: if a competitor has gone of course they have two minutes to get back on course.

Start Commands: no competitor can start until GO and the timer begins when the competitors boots cross the starting line.

Giant slalom competitors will have two timed runs. Friction resistance:
When a beginner snowboarder skids or plows, it causes Friction resistance. This frictional resistance is significantly more than the resistance seen if the snowboard were to glide on the snow, either with the base of the snowboard flat on the snow. Experiments M.J. "Jack" Burchett developed the idea for snowboarding by taking a piece of wood and applying straps for feet and something to hold onto much like a harness for his daughter to play on during the winter. He called it the snurfer. Soon every kid on the block wanted one and Burchett decided to mass produce them. How it was first played. Basically people would tie their feet to the plywood and hold onto the harnesses to slide down the hill standing up. Why they started playing? For fun really it did not become a serious sport in the olympics until 1994. Many resorts did not allow snowboarding; in 1985 36 out of the approximately 600 resorts did not allow snowboarders. The changes to the sport. Through out the sport's history the equipment has been changing. The two main groups that have been the leaders in developing this new equipment is Burton and Winterstick. Winterstick started in the 60's by Dimitrije Milovich, he left the snowboarding business in the 80's. Later, 1977 Jake Burton, who now finished NYU, moved to Londonderry, Vermont to make some money by building different versions of the Snurfer. Offcially the first real ski technology for snowboards was introduced by Burton in 1980. momentum
The angular momentum of the snowboarder is determined at takeoff (from the ramp), and cannot be changed once the snowboarder is airborne. So to make turns in the air the snowboarder must give himself initial rotation upon takeoff. Once airborne, the snowboarder can alter his body shape in order to produce an impressive aerial display of tricks and twists for the crowd, during which his angular momentum remains constant. Also during this, the snowboarder will spin to maintain momentum but must decrease his rotations to land his jump.
Angular Momentum and Net Torque.
It is possible to derive a statement relating angular momentum and net torque. Unfortunately, the derivation requires quite a bit of calculus, so we will simply revert to the linear analogue.

= Velocity: The slope effect the velocity in snowboarding, the higher the angle the higher the velocity. The angle of the slope make it harder to control the board, thus you need a high level of skill to complete said course. Momentum: Momentum allows a snowboarder able to glide across a rail. It also allows a snowboarder to launch into the air. This is only one part, if a snowboarder were to travel in a straight line they would lose control of the board. snowboarders travel in a zig-zag which can control their momentum and thus their descend I tested out if the length of boards affected the velocity. The materials I used were two snowboards, a tape measure, and a stop watch. First; I measured each snowboard. Second; I measured the hill in which I did the experiment. Third; I constructed a small wall of snow as a stopper for the snowboards. Fourth, I timed each snowboard three times until it hit the wall, they all had a ten pound weight on them. Then I calculated the times. Hypothesis My hypothesis is that the longer board will have the higher velocity because it will have less time to reach the designated displacement because of its length. Experiment one, Board one Experiment two, board two, Conclusion Bibliography http://www.livestrong.com/article/445821-how-does-momentum-apply-to-snowboarding/ http://www.abc-of-snowboarding.com/snowboardinghistory.asp http://www.skibutlers.com/history-of-snowboarding.aspx http://www.smithsonianmag.com/history-archaeology/The-Top-Ten-Most-Important-Moments-in-Snowboarding-History.html?c=y&page=3 http://www.bulgariaski.com/snowboarding.shtml http://www.olympic.org/snowboard-equipment-and-history
http://www.real-world-physics-problems.com/physics-of-snowboarding.html Kinetic and potential energy This applies to snowboarding the best. One could argue that snowboarding is the study of Kinetic and Potential energy. As a snowboarder waits at the top of the slope, the snowboarder builds an enormous amount of potential energy. Then as the snowboarder angles towards the downward slope the potential energy is converted to kinetic energy. This potential energy can also be considered Gravitational potential energy, which is then converted into kinetic energy which helps gain momentum. Then at the bottom of the hill the snowboarder is back to potential energy. as he ascends via ski lift he gains Gravitational potential energy. From there on the process is repeated. Friction friction play a big role in snowboarding. First of all without friction stopping and maintaining speed would be nearly impossible. Snowboarders do what is called "waxing the board" much like you would a surf board. However, you melt the wax onto the board and them push is to cover the entire board. This causes the board to be nearly frictionless to ensure that the snowboarder will not experience any abnormal friction that could hinder the snowboarder's ability. Angular My conclusion is that the longer board has the greatest velocity. I think this is because it has a larger mass, and thus gravity acts upon it. It goes back to the potential gravitational force. However, the difference was miniscule. So I do not think it affects preformance. This board is 110 cm and represents the shorter board

1st timed run
7.26 m/4.77 s= 1.5m/s
2nd timed run
7.26 m/ 4:24 s= 1.7m/s
3rd timed run
7.26 m/ 3:65 s= 2m/s
average velocity= 1.7 m/s This board is 149 cm, and represents the longer board 1st timed run
4:09 s
7.26 m/4.06 s=1.8 m/s
2nd timed run
5.87 s
7.26 m/5.87 s= 1.2 m/s
3rd timed run
4.71 s
7.26 m/4.71 s= 1.5 m/s
average velocity = 1.5 m/s

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