Cross Country Skiing has existed since prehistoric times. The oldest pair of skis were found to be over 4500 years old. Skiing was used as a way to travel or hunt during the winter season. The skis were designed not so much for speed but to keep the skier on top of the snow. Traditionally, the skis were made of wood, the poles were made of bamboo with leather hand straps. The boots were also made of tough leather and were fastened to the skis with sinew made from animal hides. Skiing was believed to have originated from the Scandinavian countries and this fact is complimented by active skiing lifestyle that we see today. When a man by the name of Jackrabbit Johansson came to North America in 1900, he introduced skiing to locals.
Skiing has evolved into a sport that has been proven to be one of the most physically demanding compared to any other sport. In Scandinavia, it is a way for families to connect with each other on the weekends, and to give the children some way to spend their endless energy during the week. Coming from Canada, I noticed that the American school system incorporates sports such as cross country skiing into the curricular activities. This is a good way to give students the option to explore their physical capabilities which may lead them to an active lifestyle or may even lead them to Olympic success. Just being outside brings about a positive mood, especially if you are out with your friends andjust having a good time.Cross Country Skiing is a lifelong sport that anyone can enjoy because the excitement can bring you up to levels you never thought possible.
Wax is used in Cross Country Skiing to reduce the amount of contact between the skis and snow, or to produce the proper friction to help the skier propel him-/herself forward.
Glide wax is applied to the base of the skis (but not in the 'kick-wax zone') which is in the most contact with the snow. This enables the skier to travel at faster speeds. This part of the ski is always in contact with the snow.Most glide-waxes contain a substance called paraffin which is insoluble with water (meaning that the was will remain on the skis the entire duration of your excursion!)
There are two types of glide wax: hard and soft wax
The hard wax is generally used in colder temperatures because it provides a good resistance to the firm cold ice crystals.
The first attempts at making a track were using steel, which was too heavy, and rubber, which was too flexible and brittle at cold temperatures. Eventually, manufacturers found the key ingredients. Kevlar tracks with imbedded nylon strands to reinforce and improve strength. Kevlar track is now the standard in today's snow machines. Another key ingredient to the track is the paddles.
It is what makes the wheel spin instead of just to slide on the ground. If there were to be no friction such as ice the wheels would not spin and the whole car would just slide on the ice. With all the friction the car could not move at all. With the right amount of friction which we had to apply to the car the wheels will move and the car will go at a fast constant speed. This way we used friction in the right amount and it helped our mouse trap car go the distance and meet the requirement of one set of free spinning wheels. This is how friction is used in the mouse trap
Cross-country skiing is as much of a competitive sport, as it is a back country one. Cross-country skiing is enjoyed by people of all ages, and can be relatively inexpensive. There is no need for lift tickets and with a little maintenance equipment can last for decades. As a result of its broad audience, many people don't realize that physics plays a large role in cross-country skiing. This web page was designed to briefly describe some of the concepts behind the physics of skiing, and give a basic understanding of both the sport and the science.
...ctory it is a whole new ball game. Aftermarket parts are put out for people to purchase and add to their sled, like a boy adding things to his truck to make it cooler and cooler. My sled has them on it just for the reasons that I like the speed a the faster reaction of my sled when I give it all the throttle. If it wasn't for aftermarkets the snowmobiling world would be boring because everyone would ride a Polaris because a Ski Doo just wouldn't make the cut.
The tangible characteristics are no longer present, and the wax melts. The melting, replaces the honey flavor with nothing, the flower scent with no scent, the cold and hard become the hot and liquid, the wax becomes too hot to touch let alone make a noise when rapped upon, the color changes, the shape shifts, and the size increases. Thus, everything Descartes thought to note about the wax had changed or disappeared. In his original description, he relied only upon his sense to explain the wax. But after that has failed him, Descartes calls into doubt his senses and decides to define the wax without the use of his senses. The problem Descartes runs into with this line of thinking is he now is trusting his senses to discount what his sense told him a first time. Therefore, Descartes must neglect to use his senses for the new description of the wax. Leaving his only knowledge of the wax to be its condition to change, Descartes’ new description of the wax states “only that it is something extended, flexible, and mutable … rather, I perceive it through the mind alone” (67-68). Descartes limits his knowledge from qualitative descriptions and only uses quantitative measures from his
Interestingly enough, snowboarding was invented by Sherman Poppen in North Muskegon, Michigan, back in 1965. Nowadays, snowboarding is considered one of the most popular winter sports among teenagers. On the other hand, there are many people that don’t have the slightest idea how to ride a snowboard straight down a hill. There are four steps to learn the basic skills of snowboarding.
One snowy Christmas day in Muskegon, Michigan, a young girl by the name of Wendy Poppen tried to stand up on her sled while sliding down the hill. Seeing this, her father Sherman ran into the garage and bolted a pair of skies together with wood to ""act as foot stops"" (Crane). While watching Wendy use the contraption, some of the local kids ran up to Sherman and asked him to build one for each of them. Little did he know that he had given birth to the “fastest growing winter sport” (Prosl) known as snowboarding. The history, simplicity, and rate of growth of snowboarding took the sport from being completely banned from ski resorts, to being accepted worldwide with its Olympic debut in 1998.
Skates used to be more like skis. Players glided on the ice rather than actually skated. Artifacts also show the use of animal bones as skate blades as well. Currently, steal blades are used. There is a small arc groove on the blade that provides the friction needed to counteract the slipperiness of the ice (Haché 37). The boot of the skate is hard enough to protect the foot from puck impact but also flexible enough “to allow the calf muscle to push forward and to ease knee bending when the player crouches” (Haché 35).
Pieter and I were determined to become proficient water skiers, while Rhea had knee issues that limited her participation. The Gibson Girl only had a forty horsepower motor, which wasn’t sufficient power for faster skiing or for doing tricks like skiing barefoot. I remember using the Comfort for some of our skiing before Dad traded the outboard for a sixteen-foot Gar Wood Junior, which had an inboard motor and more power. Pieter and I spent hours practicing the basics of getting up efficiently, skiing across the wake and then jumping the wake. It wasn’t long before we developed a passion for mastering slalom skiing. I wanted to ski all the time during that period.
He describes the different properties of the wax which one find’s out using the bodily senses. After which he brings the piece of wax against the fire, and as a result the properties he previously identified are altered. This is seen when he describes “But notice that while I speak and approach the fire what remained of the taste is exhaled, the smell evaporates, the colour alters, the figure is destroyed, the size increases, it becomes liquid, it heats, scarcely can one handle it, and when one strikes it, no sound is emitted. Does the same wax remain after this change? We must confess that it remains” (Descartes 11). At this point Descartes is putting emphasis on the fact that there remains a piece of wax, despite all the changes the wax has undergone. If you look at this from Descartes way of thinking, the truth is gotten when one suspends their belief in what we imagine or sense, and in this example even after being exposed to the fire, it still remains that the wax is wax and nothing else. The senses itself that Descartes
Wind tunnel and flight tests have shown that frost, snow, and ice accumulations (on the leading edge or upper surface of the wing) no thicker or rougher than a piece of coarse sandpaper can reduce lift by 30 percent and increase drag up to 40 percent. Larger accretions can reduce lift even more and can increase drag by 80 percent or more. (AOPA, 2002, 2).
Sports programs have been an integral part of all schools. They support the academics of the school and therefore foster success in life. These programs are educational and help produce productive citizenship. They help students experience and build skills that may help them in their future, like interpersonal and time management skills. Education may kindle the light of knowledge, but sports help to maintain the proper physique. Sports are also an important means of entertainment and a use for energy after long hours of study. Sports increase a student’s performance not only in the classroom but also in their life.
Skiing, as a sport has existed since the early 1800’s, although depictions of skis have been discovered throughout Europe dating back thousands of years. Skiing as a recreational activity became popularized in the mid 1800’s however it did not arrive in the United States until around 1841. Once the concept of skiing reached the states, it took off. The United States continued to power advances in skiing for decades, with the introduction of rope tows, then actual ski lifts. By the 1950’s several ski areas had begun snowmaking and trail grooming, two American born inovatio9ns which ensured better skiing conditions and launched the US far ahead of Europe in ski technology (Fry 38). Skiing continued to evolve throughout the 1900’s, constantly changing and adapting to improve athlete performance and recreational experiences. Skis and equipment changed quickly and frequently, ski bindings, which...
Challenge plays an essential role in defining a sport; it provides the individual with the feeling of achievement in success. Skiing poses challenge even in its simplest foundations. Skiing on a poor quality hill, with icy snow and poor upkeep can sometimes create more challenge than a well-groomed slope. Skiing in the backcountry away from lifts and other people in freshly fallen snow provides an opportunity for the best of skiers to test t...