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History of pole vault
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The Physics of Pole Vaulting
The very idea of flying through the air at 15-19 feet just to clear a little bar scares some people to death. Maybe even more if the only thing that you have to hold onto is a little piece of plastic. The purpose of this paper is to help put some of these fears to rest from the point of view of physics.
The way that pole vaulting started was during WWII. The men in the army used bamboo poles to jump over canals and ditches. After the war some people found the sport so fun that Table I. Material Requirements for a Vaulting Pole I (Requirement I Possible
Material Light (Low Density) J~ Bamboo Buckling Resistance Stiffness) luminum V rong (Resistance to astic Strain) (Steel inimal Twisting (High rsional-Strain ro(esistance)agnesium lCost arbon Fiber romposite2
1 http://entertainment.howstuffworks.com/framed.htm?parent=polevault.htm&url=http://www.tms.org/pubs/journals/JOM/9702/Froes-9702.html#ToC5
2 http://entertainment.howstuffworks.com/framed.htm?parent=polevault.htm&url=http://www.tms.org/pubs/journals/JOM/9702/Froes-9702.html#ToC5
the other page has materials that some poles have been made out of and some of the reason why they were made.
The pole was not the only piece of equipment that improved over the years. If you were jumping over a ditch or canal the only thing that you had to land on is the ground. When the sport was brought back to the states people put sawdust for the jumper to land on. With how high professional pole-vaulters are jumping, landing on top of sawdust would probably end up breaking some of their bones. So engineers have designed pole vault pits for jumpers to land on that absorbs the energy of the jumper more effectively, making the landing a lot smoother an...
... middle of paper ...
...make them think twice about jumping. This is where all the accidents happen in the pole-vaulting, the athlete second-guessing himself about his step and tries to fix the so called “problem” while running. So most fears have nothing at all to do with physics of pole-vault, but the human mind is what makes them afraid to jump.
Work Cited
1.http://entertainment.howstuffworks.com/framed.htm?parent=polevault.htm&url=http://www.tms.org/pubs/journals/JOM/9702/Froes-9702.html#ToC5
2.http://entertainment.howstuffworks.com/framed.htm?parent=polevault.htm&url=http://www.tms.org/pubs/journals/JOM/9702/Froes-9702.html#ToC5
3.Kirkpatrick, D. Larry, Wheeler, F. Gerald, Physics A World View. Fourth Edition, Philadelphia. Thomson Learning, 2001 (pg 132, 139).
4.http://multimedia.olympic.org/pdf/en_report_399.pdf
5.http://multimedia.olympic.org/pdf/en_report_92.pdf
The development of the lacrosse stick is really interesting because it started off as a one piece of wood. The stick was handmade by chopping down a tree and carving each individual stick out of it. Then the Canadians made the stick making process several times easier and less expensive by reducing the manual labor. The first modern stick model was produced by a company STX that still produces lacrosse sticks today. STX invented the plastic head stick in 1964 but did not manufacture it until 1970. The new model introduced a stick with a lightweight, symmetrical, perfectly balanced triangular plastic head with leather shooting strings and a synthetic material pocket. The new head assembly was attached to a wooden pole. But later the company created aluminum and other metal composite poles for lighter and stronger shafts with different colors too. The creation was a great innovation in modern lacrosse because the pocket structure could create mo...
5th Feb, 2014. Wolf, Johnathan. " The Spotlights." Wolf, Johnathan. AP Physics B. Barron’s:
Aristotle, R. P. Hardie, and R. K. Gaye. Physics. Adelaide: The University of Adelaide Library, 2000. Print.
3. I. Boldea and S.A. Nasar, Linear Motion and Electromagnetic Systems. John Wiley & Sons Inc., 1995.
They invented this sport because they saw a lack of enthusiasm in their school, so they decided to make it a little fun, and to have more of a fun time at school. These two wonderful men invent a jump that was called a “herkie”, but it is now called a “hurdler”, and i believe they also invented a jump called a toe touch. Cheerleading was invented when the first intercollegiate was played in 1869, but it wasn’t until 1923 that women were allowed to cheer for the first time. During this decade , cheerleaders started to add acrobatics to their routines. These acrobating moves are called tumbling in the cheer language.
In earlier meditations Descartes proved that he existed through the Cogito argument. Descartes must now move on to examine and explore questions about the world around him, but instead of doing this he first stop to examine the question of whether or not God exists. Descartes wants to know that he was created by an all knowing, perfect creator that is good and wants to make sure that he was not created by an evil spirit or demon. If Descartes can prove that he was created by a perfect all knowing creator then his ideas must carry some semblance of truth, because God is not a deceiver and he must of placed these ideas in Descartes. Descartes has good reasons for searching for the answer to the question of God’s existence, now he has to come up with a good sound argument to prove it.
...es me, “God should have endowed me with this idea, so that it would be like the mark of the craftsman impressed upon his work” (Descartes 34, 51). Descartes says “the whole force of the argument rest on the fact that I recognize that it would be impossible for me to exist, being of such a nature as I am (namely, having in me the idea of God), unless God did in fact exist.” (Descartes 35, 52) My nature and my existence themselves prove the existence of God, therefore, Descartes says “the mere fact of my existing and of there being in me an idea of a most perfect being, that is God, demonstrates most evidently that God too exists.” (Descartes 34, 51)
Poles used for public ridicule are usually called shame poles, and were created to embarrass individuals or groups for their unpaid debts or when they did something wrong. The poles are often placed in prominent locations and removed after the debt is paid or the wrong is corrected. Shame pole carvings represent the person being shamed.(5)
The main theories behind why muscle forces accelerate the body upwards greater in countermovement jumps in comparison to squat jumps: a brief review
These include, high strength, low weight, high chemical resistance and high cut resistance. This material does not corrode or rust and is also unaffected when placed in or under water.
The purpose of my essay will be to examine Descartes' argument for the existence of God. First, I will discuss Descartes’ proof for the existence of God then I will critique the argument of his existence. Lastly, I will point to some complications and problems that exist within the proof. Descartes’ proof of the existence of God is presented in the Third Meditation. He shapes his argument on the proof in the Second Meditation that in order for Descartes to think he must exist. From this specific examination he realizes his existence is very clear and distinct in his mind because of the fact he had just discovered his own existence. He then creates a rule that whatever things he sees are clear and distinct, are all true. Descartes begins his proof by splitting his thoughts into four categories, which consist of ideas, judgments, volitions, and emotions. He then further analyzes these categories to decide which thoughts might consist of error.
Organized figure skating has been around since the 18th century. Since then it has grown and evolved into the Olympic sport we see today. There have been many notable skaters and moves in skating's distinguished history. One of the most interesting and storied is the axel jump.
There is a third formulation of the argument forwarded by Descartes in his replies to the objections: “(A) That which we clearly and distinctly understand to belong to the true and immutable nature, or essence or form of something, can truly be asserted of that thing (B) With sufficient and careful investigation of what God is, we clearly and distinctly understand that existence belongs to his true and immutable nature. (C) Hence, God does exist.” 1
James Naismith, born 11/6/1861, in Almonte, Ontario, Canada invented the greatest game of all time. Basketball was invented December 1891 at a YMCA gymnasium in Springfield, Massachusetts. The game was invented to be an indoor game for students to play during the cold winter months since there were no previous indoor game that could involve a whole class. Basketball started out with only 13 rules that were made by Naismith in 1891 and the rules have continued to grow and change up to present day.
...undational premises, such as the existence of God and the mind, do not provide indisputable groundwork for Descartes’ argument. First begging the question to prove the existence of the mind via dualism, and then conflating logic with cultural and personal ideals, these two tenets cannot stand on their own. In the case of Descartes’ Meditations on First Philosophy, foundationalism does not endure close scrutiny.