Personal Watercrafts or "jet skis" are basically Personal Watercraft (PWC) are basically small inboard boats able to travel at high speeds due to large amounts of power and very light weight. Alomst all PWC's are under 600 lbs and most of todays PWC's have at least 90 hp.Not only are PWC's some of the fastest water vehicles they are also some of the most maneuverable water vehicles. This is because PWC's propultion is based on a jet that also is it's turning mechanism. When the driver turns the handlebars the jet (via cables) turns in the direction of the handlebars so the stern is pushed in the opposite direction. This allows the driver to turn at a much tighter angle than traditional boats with keels and rudders.The main drawback to this maneuverability is the fact that if there is no thrust coming from the engine the ability to turn is effictively zero meaning that anytime the driver presses the kill switch (a large red button) they lose all ability to steer. This is extremely dangerous whenever an inexperienced person may drive the PWC back to dock or into shore. PWC's have no brakes and have no ablilty to stop other than turning around. They have an extremely efficient ability to hydroplane (when most of the PWC is above water) and it takes most PWC's a few hundred feet to come to a stop after being at full throttle. This is because 600 lbs + a rider is traveling at a very high speed with only minimal friction to slow them down (since PWC's are made to travel with very little friction).
PWC's also have a problem with turning. When a PWC is at full speed there is a great amount of force produced by the jet and the vehicle is therefor very difficult to turn. The main way to turn sharply during high speeds is to let of the throttle temporarily. This slows the amount of water flowing through the jet so the jet can be turned. Once the jet is turned the driver can depress the throttle again. Although being very effective this tecneque can also be quite dangerous. When the PWC turns it resists it's change in motion, however the driver does not recieve the same change in motion. The driver's body still wants to continue in the previous path of the PWC. Unless the Driver holds on very hard the driver is likely to fall of the PWC at a very high speed.
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.
During this semester of English 1302, I feel as if this was way more interesting than 1301. In fact, I did learn a lot of new things about gender and how it takes its role in society. I never understood why it would actually matter, but it really does matter.
American author, Stephen Crane often wrote about different predicaments that his fellow men encounters. “The Open Boat” is a fictional account of his experience as a correspondent shipwrecked while on expedition to the Cuban revolutionaries in 1897 (http://www.poetryfoundation.org/bio/stephen-crane) where he spent over 30 hours on a life boat with three other passengers. This realistic story depicts how four men are forced onto a 10 foot dingy after their ship sinks. Crane takes a realist approach when describing the natural elements such as unsettling winds and the raging seas which represent the uncaring and unforgiving nature of life. Clearly, Crane narrates the role as the correspondent, while he provides dialog to provide an understanding on how the other passengers are feeling. “The Open Boat” demonstrates that man cannot survive the natural elements and hardships while isolated in the sea without an understanding of nature.
Biomechanics is the overall topic that will be discussed throughout the presentation, this incorporates a brief discussion about water resistance, propulsion and buoyancy. Under lifesaving, appropriate techniques and the choice of stroke for the Timed Tow will be analyzed and justified.
“The Boat”, narrated by a Mid-western university professor, Alistar MacLeod, is a short story concerning a family and their different perspectives on freedom vs. tradition. The mother pushes the son to embrace more of a traditional lifestyle by taking over the fathers fishing business, while on the other hand the father pushes the son to live more autonomously in an unconstrained manner. “The Boat” focuses on the father and how his personality influences the son’s choice on how to live and how to make decisions that will ultimately affect his life. In Alistair MacLeod’s, “The Boat”, MacLeod suggest that although dreams and desires give people purpose, the nobility of accepting a life of discontentment out weighs the selfishness of following ones own true desires. In the story, the father is obligated to provide for his family as well as to continue the fishing tradition that was inherited from his own father. The mother emphasizes the boat and it’s significance when she consistently asked the father “ How did things go in the boat today” since tradition was paramount to the mother. H...
The following paper analyzes the Whitbread World Sailboat Race case scenario presented at the end of chapter 9 in the Gray and Larson text, Project Management: the Managerial Process. The project encompasses two main objectives; one, design, build and test a new vessel, and two, select and train a crew capable of winning the race. Both objectives must be completed within 45 weeks, the start of the race, and with a planned budget of $3.2 million.
The novel Swimming in the Monsoon Sea by Shyam Selvadurai is about the journey of living and reveals that life is not fair not to mention, it will always continue to advance with no pauses regardless of the situation.
Not many know about Dragging Canoe and the battle he fought during the American Revolutionary War. The Native American’s role in the Revolutionary War was very important, but not well known. As a result, the Revolutionary War can come across as one-sided. Dragging Canoe fought for the Native American’s existence in the colonies. First, he was strongly opposed to Henderson’s Purchase or also called the Transylvania Purchase. Secondly, Dragging Canoe’s raid at “Battle of the Bluffs” became an issue for the colonists. And lastly, there was negotiating done between the British and Colonists would somehow effect Dragging Canoe, his warriors, and the future for the Native Americans.
This passage defines the character of the narrators’ father as an intelligent man who wants a better life for his children, as well as establishes the narrators’ mothers’ stubbornness and strong opposition to change as key elements of the plot.
Before a diver jumps off of a springboard, he does a sort of hop-skip step called a hurdle. After doing a few steps, the diver leaps up into the air with his arms raised. When he lands back down on the tip of the board, he swings his arms down past his legs and then up, leaping into the air and off of the board.
Although a hydrofoil is defined by the Columbia University Press as “a flat or curved finlike device, attached by struts to the hull of a watercraft that lifts the moving watercraft above the water's surface”, the word is often used in reference to the watercraft as a whole. Using the same principles as an airplane wing, the foil develops lift as it moves through the water, eventually raising the hull of the boat above the surface as it reaches higher speeds. Thus, the drag experienced by the vessel is far less, making the ship far more efficient and economical to run. In fact, hydrofoils are now the vehicles of choice as ferries in many European and Asian countries, as well as for the American military. However, though the hydrofoil maintains the appearance of simple functionality, it is actually quite a complex mechanism with deep-rooted history. Let’s take a look: In 1906, an article published in Scientific American outlined the basic principles under which a hydrofoil should function. Logically, the principles made sense, but they had never been put into practice. However, always up for a challenge, Alexander Graham Bell got to work on the physical construction of such a vehicle, completing his work in the year 1919. His masterpiece, the HD-4 set a world marine speed record of 114 km/h – a record that remained unbroken for over ten years. During testing, Bell’s colleague, Casey Baldwin was said to describe a ride on the HD-4 as being “as smooth as flying.”
There are really only two main forces acting on a skier, they are gravity and air resistance. The first and most important thing relating to the physics of skiing is the law of gravity. Gravity is the most familiar force in our everyday lives it is the force that keeps us on the ground it is also the force that makes things fall. We have all heard the saying, “what goes up must come down.” This saying is relating to gravity.
Fishing contains a wide variety of physics. when you cast you are using projectile motion and rotational motion. when you hook a fish it will often use the drag from the current agenst you. Immagine draging a fish through a swift current. You deal with the tention of your line, and the friction of the line through the guides. you also deal with friction when you use a drag.
...both worlds for its purpose, the dragster. The Dragster has extremely wide rear tires for acceleration and to keep it going straight. The dragster has extremely thin tires in the front to reduce rolling resistance and because handling is not a concern the car goes in a straight line it does not need to turn.
A buoyant force (FB) is the upward force, exerted on a body, by a fluid (Cengel & Cimbala, 2013: 98). The calculation of the buoyancy would be vital as the total weight of the mechanism cannot exceed the buoyancy force. This would result in the mechanism sinking.