HOMEWORK PROBLEMS Chapter 4: THE LAWS OF MOTION PART-A: Hand in your answers in class on scantron on Wednesday 22 September-2010. The questions have been numbered so you can use the back side of an older scantron. Write your name‚ class (1401) and HW # 4 on the scantron. 1. A horizontal force of 95.0 N is applied to a 60.0-kg crate on a rough‚ level surface. If the crate accelerates at 1.20 m/s2‚ what is the magnitude of the force of kinetic friction acting on the crate? (a) 23.0 N (b) 45.0 N
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RECOMMENDATION REPORT: MOBILE PHONES The purpose of this report is to help Smith Courier Service‚ Inc.‚ select a mobile phone that provides the requisite functions to accommodate its business needs. In researching mobile phones it is best to select a service provider first‚ such as Verizon or T-Mobile because mobile phone functions vary from service provider to service provider. For example‚ Motorola has several versions of the popular RAZR: RAZR (original) RAZR V3 (T-Mobile/Cingular) Mobile RAZR
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costs. Differentiation but also brand recognition is required to sell on this market because buyers have high power. Supplier power of bargaining is moderate. There is limited number of supplier because most of the companies like Research in Motion are designing‚ manufacturing and programming all the devices themselves. However there are numerous hardware and software suppliers. Competitors have a high power. There are many equally balanced competitors. Moreover‚ there is a limited differentiation
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Exercise 1: Rectilinear Motion Background The average accelerations of a US Navy fighter jet takeoff to an US Air Force fighter jet takeoff are very different. The aircraft conditions are the same except the Air Force fighter is on a 12‚000-ft dry concrete runway and the Navy fighter is on the catapult of an aircraft carrier. (Hint: You will have to use two different methods because you are not given the catapult force‚ but you have the catapult distance. Assume aircraft is airborne after the catapult
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How Sugar Affects the Body in Motion By GRETCHEN REYNOLDS Gary John Norman/Getty Images Sugar is getting a bad reputation. A cover article in The New York Times Magazine several weeks ago persuasively reported that our national overindulgence in fructose and other sugars is driving the epidemics of obesity‚ diabetes and other illnesses. But that much-discussed article‚ by the writer Gary Taubes‚ focused on how sugars like fructose affect the body in general. It had little opportunity to examine
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on Change-Motion In our current times‚ we do not stop to think about or question change or motion in our material world. We now know that change and motion exist. Even if we as individuals don’t know the properties and processes that cause change or motion‚ we don’t doubt that they are possible‚ as science has proven that they are in fact plausible. However‚ information about change and motion has not always been so well defined. The unknown aspects of what caused change and motion‚ how it affected
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Heraclitus‚ like many of the beginning philosophers was a monist. His interpretation of the one reality was fire; however‚ this is not to be taken literally. Heraclitus believed that the “one” could not be any material thing‚ but could be found in the orderliness of change and he explained fire as “always changing yet somehow is always the same.” By having orderliness‚ there is possibility for the human mind to understand the cosmos instead of it being chaotic and based on the gods’ wills. He believed
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Music Inspiring Human Movement Paul Belk Arts 100 October 3‚ 2011 Danny Mullen Music Has the Ability to Do Most people have a favorite song or melody that they enjoy hearing. Whether it is a song they learn to sing at an early age or even a tune from a popular band. Certain sounds just stay with people as time goes on. This powerful affect shows how important people believe music is to their lives. Music
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Dynamics describes the relationship between force and motion. Force? What is it? Put in simple terms‚ a force is a push or a pull. It pertains to any influence that causes a change in an object’s state of motion. • Contact Force A contact force is produced when there is direct contact between two interacting bodies. • Long-Range Force A long-range force is produced when one body influences the state of motion of another body even if these two bodies are separated by empty space. • Concurrent Forces
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INTRODUCTION: Space‚ Time and motion were three interrelated concepts which have been very difficult by the philosophers to arrive at a proper understanding since the ancient times. By there has been consensus that a proper understanding of motion would lend a hand in addressing the questions on the nature of the other two concepts namely space and time. Depending on the nature of approach to the problem of space and time‚ the philosophers mainly addressed three key concerns. They are as follows:
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