Physics of Skiing :: physics sport sports ski skiing

Skiing is an old sport; the oldest artifacts date back over 4000 years. It was developed in the Scandinavian region, especially Norway, and didn't spread to the rest of Europe until the sixteenth or seventeenth century. It probably came over with Norwegian and German immigrants during the nineteenth century. Skiing relies on many different forms physics. Newton's Laws of Motion, the transformation of potential energy into kinetic energy, air resistance, circular motion, even conservation of circular momentum is used as skiers pump upwards during a turn. Friction is by far the least understood of these forces. The surface of snow is a strange interaction between water, ice and water vapor, the three forms of water found on Earth. Snow changes properties and is difficult to measure and study in its natural environment. Snow changes properties and is difficult to measure and study in its natural environment. Ice Crystals form when water vapor condenses around and freezes upon a foreign particle such as dust or sea salt. These Ice crystals then form various varieties of snow flakes. Snowflakes can fall in many forms, including ferns, crystals and needles. These snow flakes begin transforming as soon as they hit the ground. They begin to morph in a combination of melting, freezing, evaporation and sublimation*. They become needles, columns, and finally simple round pellets. * Sublimation is when ice evaporates directly instead of melting first to water and then evaporating. These pellets the bond again through a process of melting, freezing, evaporation and sublimation at their contact points, this creates a strong snow pack. Snow Compaction and Work One thing that slows a skier down is the compaction of the snow beneath a skier. Snow is mostly air and this allows a great degree of compaction. On packed trails, this compaction is negligible and contributes only slightly to the friction of the snow on the skis. This diagram shows a skier who travels l distance on unpacked snow and sinks in h into the snow. Logically, the distance the skier sinks in, h, is proportional to the skiers weight, FN. Work is defined as a force applied over a distance. The work needed to propel the skier l distance through the snow is the same as the work done be the skiers weight along the height, h. the force used to move the skier is defined as FFORWARD then FN*h= FFORWARD*l With different types of snow, a skier with the same weight will sink in different distances.

Emotional Bank Accounts Essay

We all do things that are counter-productive to our relationships. We all like to have people be nice to us. The concept of an emotional bank account is powerful, yet not quite as simple as keeping a ledger of debits and credits. One of the problems is the perception of worth. What is a â€Å"deposit† worth. We may think it is quite valuable. The affected person may consider it so routine it is not even remembered. The trick in making deposits is to know what value the act has for the person holding the account. Herzberg was a psychologist who studied motivational factors in American industry. He came up with the conclusion, since quoted out of context, that money is not a good motivator of people. He called things like money, a safe work place, security and such fundamentals â€Å"hygiene† factors. That is, the employee needed them to be there and assumed they would be there. They were not, however, efficient in motivating job improvement. Herzberg found that various methods of showing personal appreciation were far more important. A company golf team, a compliment, a letter of commendation, a corner office, painting an employee’s name painted on a parking place and such activities were more efficient in motivation. Do you agree? Many students do not. To many people, money is a prime motivator. How then did Herzberg come up with his findings? Is he wrong? No, we have to understand another theory, Maslow’s Hierarchy of Needs. Maslow was also a psychologist who studied motivation and found that people had needs that varied with their circumstances. If you are living in the weeds, any job that provides 3 hots and a cot is your dream. You think you would never want anything else. But when you get that job, those needs are satisfied and you quickly want more. Maslow said the second stage was to want security. You want those physiological needs to be there in the future, not just today. And, if you get that security, you then go to stage three where you want a feeling of belonging to a group that reflects your values and goals. If you get this feeling of belonging, you then go to a stage where you want to be singled out and honored. The last stage is one where you  have all those needs met, so you want to contribute in some special way to something greater than yourself. Herzberg did his studies in a shop where people had stage one and two pretty much assured. Those physiological elements did not motivate because they were already met. Those people were at the stage where they either wanted to belong to a group or be singled out for honors. The ability to read another person and determine what is important to them is critical. This gets back to our emotional bank account deposit value. Similarly, actions may have different withdrawal value to different people. To someone who is feeling very insecure because of seeing everyone around them being dismissed in a general layoff, a curt word may have them dusting off their resume and reacting very defensively. It may not have been intended in that way but its effect is the important thing. Our success in keeping a good emotional bank account with other people then depends upon our sensitivity to the values that other people hold, not our own. This sensitivity is difficult for most of us as we often have â€Å"tasks† to do and keeping track of the effect of our actions and words may not be high on our list of things to do at the moment. Yet, in the long term, nothing is more important. I once heard someone say of a particular organization, â€Å"this place is not about competence, this place is about relationships†. I think that is true of just about any organization.

Smoking Should be Banned in Public Places Essays - 1464 Words

During the past few decades it has come to light that smoking kills. The federal government mandates that every pack of cigarettes carry a warning on it that smoking can lead to health problems including death. But the messages are rather clinical, for example: â€Å"Smoking Causes Lung Cancer, Heart Disease, Emphysema, and May Complicate Pregnancy.† Smoking is a danger to one’s own health but there is now evidence that smoking can affect others as well. Second hand smoke has been shown to cause cancer. Second hand smoke has been shown to produce the same negative health effects that smoking first hand does. Cities across the nation are taking it upon themselves to address the issue of smoking in public place because of the evidence about†¦show more content†¦The hospitality industry has long argued that smoking bans cause great financial difficulty for bars and restaurants because of the link between smoking and drinking. But a new study by the University of Minnesota shows that smoking bans in eight Minnesota cities did not have any significant impact on employment in those businesses (Benson). One of the aspects that are argued is the freedom of choice. Freedom of choice mandates if a person wants to smoke they should be able to. While the freedom of choice issue is debated and measures are taken to assist people in breaking their addiction to smoking there are strong reasons for implementing a nationwide ban on smoking in bars and restaurants. Smokers want to be able to enjoy a cigarette following their meal or while they sip their drinks. They have lobbied to stop bans around the country and threatened to boycott any business that voluntarily places a ban on smoking in their establishment. For a long time, the hospitality industry maintained that if nonsmokers didnt like smoke, then they shouldnt go into places that allowed it. Few buy that argument any more. Nonsmokers want to go where they want and not have to suffer exposure to smoke as the price they pay. The Tobacco Industry fights smoke-free laws because smoke-free laws result in a decline in the consumption of tobacco products, an increase in the cessation rate among smokers, and an overallShow MoreRelatedShould Smoking Be Banned Public Places?941 Words   |  4 Pagesindividuals get older they try to cope with the stresses of everyday life by continuing to smoking. It makes them feel more relaxed and at ease. Whatever the reason is, it is a hard habit to break once one starts. For many smokers today it is getting hard to find a place to smoke. Comedians joke about going to another planet just to light up. Smoking should be banned in public places because smoking is just as bad for nonsmokers as it is fo r smokers. The effects of secondhand smoke orRead MoreShould Smoking Be Banned Public Places?864 Words   |  4 PagesSmoking is one of the practices which is considered highly dangerous to our health because it impacts the smoker and the people around them. There are approximately one billion smokers. Smoking is a big issue that the nonsmoker faces. For example, when the smokers smoke in public places like restaurants, universities and other public places it hurts the non-smoker. The non-smoker breathing the cigarette, marijuana or hookah smoke from the smoker do both of them are breathing toxic chemicals. In aRead MoreShould Smoking Be Banned Public Places?950 Words   |  4 Pagesday I walk in to public place with a friend right away we sat down to eat, we were having a conversation later we smell cigarette smoke in the air. I start coughing from the smell of smoke. I also notice a lot of customers who like eating dinner at a public place smoking cigarette. Smoking is a big health p roblem I feel it is not fair to take away cigarette for people who smoke in American who desire smoke cigarette. Even thought the same as the concession is able to be taking place on this topicRead MoreShould Smoking Be Banned Public Places?885 Words   |  4 Pagesday I walk into public place with a friend right away we sat down to eat, we were having a conversation later we smell cigarette smoke in the air. I start coughing from the smell of smoke. I also notice a lot of customers who like eating dinner at a public place smoking cigarette. Smoking is a big health problem I feel it is not fair to take away cigarette for people who smoke in American who desire smoke cigarette. Even thought the same as the concession is able to be taking place on this topicRead MoreSmoking in Public Places Should Be Banned Essay474 Words   |  2 PagesSmoking in Public Places Should Be Banned I feel very strongly that smoking in public places should be banned. I will list my reasons for my thinking below and explain why I think this. I cannot stand walking down a street behind someone who is smoking. Every time they exhale I then have to walk into a cloud of their smoke. My clothes smell, because they have been saturated with the smoke, it gets into my hair too. It also affects my health. It was found that sevenRead MoreEssay on Smoking In Public Places Should Be Banned463 Words   |  2 PagesSmoking In Public Places Should Be Banned There should be rules enforced for smoking in public places. Smokers just do not know the negative influence they are spreading. A puff of cigarette can harm a smokers health. When I go to a restaurant I do not like to leave smelling like smoke. It is the same going to a garbage dump, and smelling like garbage. I am not a smoker, and I cannot stand having the stench of smoke on my clothes. The smell of smoke is not harmful, but secondhand smoke isRead MoreEssay Smoking Should NOT Be Banned in Public Places730 Words   |  3 PagesSmoking Should Not Be Banned in Restaurants      Ã‚  Ã‚  Ã‚   In the perfect situation, smoking policy would be set by bar or restaurant owners, and customers would patronize the establishments with the policy they prefer. Customers would decide-without the governments help-if they want to avoid smoke-filled rooms or enter them. They might even choose to sit in an area sectioned off for smokers or non-smokers, but the ultimate issue is choice (Ruwart 1). When the government starts telling restaurantRead MoreEssay about Smoking In Public Places Should be Banned766 Words   |  4 Pages Do you mind people smoking around you in public places? According to the pro-smoking group Air Initiative 7 in 10 of you do. Do you think it is fair to discriminate against smokers, forcing them to stand outside and smoke? On the other hand is it fair that non-smokers should have to inhale second hand smoke which can dame their health? (Do you support this ban or do you oppose it?) Personally I oppose it as I believe that non-smokers shouldn†™t be subjected to a smoky environment on a night out.Read MoreNationwide Smoking Ban: Smoking Should be Banned in All Public Places899 Words   |  4 Pagesthe public about its dangers in 1972 (Schick Glantz, 2005). Do people knowingly have the right to put others’ health at risk? No, they do not. Exposure to cigarette smoke is a public health risk. Therefore, smoking should be banned in all public places, nationwide. There has been no attempt to impose a national smoking ban by the U.S. government. All current bans are in place because of state and local legislation. Americans for Nonsmokers’ Rights lists the various state and local smoking lawsRead MoreEssay about Smoking Should be Banned in All Public Places1133 Words   |  5 PagesSmoking Should be Banned in All Public Places Every year thousands of people die because of having cancer or other tobacco related illnesses due to smoking. Smoking is seen everywhere from our own television screens to even the world wide web; the internet. Tobacco is the substance that is in these cigarettes. These tobacco products are promoted through tobacco ads that are found almost everywhere you turn. They are in magazines, television screens, on the internet