Premium Essay

Size 6 Ball Research

Submitted By
Words 2044
Pages 9
Sports in our world today is a significant aspect of many cultures and national identities. Successful sportsmen/women are treated like heroes, and the fans can go to incredible lengths to support their team. With the huge importance placed on sport in our modern world, it therefore is important for every athlete to have to deal with the same conditions and equipment to ensure fair play. The large majority of all sports in the world are ball sports, whether it is being thrown, kicked, hit or bounced. With the large variety of ball shapes and sizes, it is natural for people to compare and experiment to see which produces the most movement in any particular direction. One example of this is bounce. Though there are many different types of balls, …show more content…
The size 6 ball bounced back to 74.9% of its original height, the heavier size 7 ball bounced back to 73.4% of its original drop height, and the other size 7 ball bounced back to 70.6% of its original height. This fits well with rule 1-12-2 which states, “The ball shall be inflated to an air pressure such that when it is dropped to the playing surface from a height of 6 feet (1.82m), measured to the bottom of the ball, it shall rebound to a height, measured to the top of the ball, of not less than 49" (1.24m) when it strikes on its least resilient spot, nor more than 54" (1.37m) when it strikes on its most resilient spot.” (A.Maker 28/1/2006). When put in terms of percent height, this gives a range of 68% to 75%. All results were within that margin, indicating that the data is fairly …show more content…
The theoretical velocity of the free falling balls were calculated, taking into consideration each slightly different drop height (see sample calculation 3). These calculation do not take into consideration the air resistance encountered by the basketballs, thus it would be expected that the size 6 ball, with a smaller surface area, would encounter less air resistance and get closer to its theoretical velocity. However, the size 6 ball reached only 34.2% of its theoretical velocity, whereas the 593g size 7 ball reached 38.6% of its theoretical velocity, and the 589g size 7 ball reached 39.9% of its theoretical velocity. This is quite surprising, considering Galileo's observation that, “All free falling objects fall with the same acceleration.” One potential reason for this could be the different surface of each basketball. Different brands of basketballs have different surfaces; some have ridges and bumps to provide extra grip for the person holding the ball, while some are simply flat. These ridges were present on both the size 7 balls, but not the size 6 ball. This could have possibly changed the aerodynamics of the basketball, thus resulting in the higher velocity. It is surprising, considering that one of the reasons given for the size 6 ball to bounce higher was its lower air resistance, and thus higher velocity at the point of impact with the ground.

Similar Documents

Free Essay

Ballpoint

...the requirement of Business Communication course to correlate the theoretical learning with the practical life situation. The study is conducted for determining the existing student’s preferences and reaction towards ball pen. 2. Literature Review: “Attitude is an evaluative response, usually contrasted with simple belief by its more direct connection with motivation and behavior. An attitude is a state whose real meaning is satisfaction or active dissatisfaction with some way the world is rather than a simple cognition of the way world is”.(http://www.answers.com/attitudes&r=67). This report has mainly focused on student’s attitude toward ball point pen. While surveying we have come know about some characteristics of ball point pen. Then we have found some technical words used to describe pen’s characteristics such as “Elastogrip”. It means the elastic clasp. (Oxford Advanced Learner’s Dictionary 7th Edition). 3. Problem Statement: The topic: Student’s Attitude toward Ball Point Pen: A Study Based on BIBM. The main idea: The main idea is to identify the factors that the students consider while buying a pen and to know which pen the students use most and why. Time and place context: This study has covered only the present market situation of ball pen. The survey has been conducted only at Bangladesh Institute of Bank Management. Factors of the problem: While buying a pen, students consider many factors such as superior quality, high availability, lower price...

Words: 956 - Pages: 4

Premium Essay

Advantages And Disadvantages Of Milling

...Selvam1, S. Ravi2, 1 Research scholar, Department of Mechanical Engineering, Bharath University, Chennai, India. 2 Professor, Department of Mechanical Engineering, Sriram College of Engineering, Chennai, India. Abstract Among the various non-oxide ceramics, silicon carbide (SiC) is the leader. The attractive properties, such as good specific strength and Young’s modulus as a function of the temperature, the specific stiffness, relatively low weight, corrosion and erosion resistance and easy availability in complex engineering shapes, have made SiC an attractive alternative to the hard metal compositions. These products are applied for high...

Words: 1353 - Pages: 6

Premium Essay

Shaheer

...Hypothesis Testing- Practice Questions Q: 1 A local school board member wants to know if sophomore students at Lincoln High School have approximately the same reading level as the state average for tenth graders. The state average is 150 words per minute with a standard deviation of 15. The level of the test is to be set at .05. A random sample size of 100 tenth graders has been drawn, and the resulting average is 157 words per minute. Q: 2 A can of peeled whole tomatoes is supposed to contain an average of 19 ounces of tomatoes (excluding juice). The actual weight is normally distributed random variable whose standard deviation is known to be 1.9 ounces. A random sample of 25 cans yield 18 ounces as the average weight. At 1% level of significance, test the hypothesis that the mean weight is below 19 ounces. Q: 3 A U.S. dime is supposed to weight 2.268 grams with a SD of 0.026 grams. A random sample of 15 circulated dimes showed a mean weight of 2.256 grams. Test the hypothesis, under the assumption that data is normally distributed, the mean weight of all the circulated dimes lower than the specification. Q: 4 A company currently pays its production employees a mean wage of $15.00 per hour with a standard deviation of $2.40. The company is planning to build a new factory and is considering several locations. The availability of labor at a rate less than $15.00 per hour is a major factor in the location decision. For one location, a sample of 40 workers showed a current mean...

Words: 734 - Pages: 3

Free Essay

Reaction Paper about Volleyball

...Introduction Sports by their nature are enjoyable, challenging and absorbing, and require a certain amount of skills and physical condition. In the order of human values conquest in field of sports hold a unique plane. It is the combination of success, victory, triumph and domination of mover other team mates and fiends. The sublimity of competition is in the loser’s acclaim for the winners, which along with the friends and shake acknowledge both defeats and triumphs. Athletes for superior performance in any sports are selected on the basis of physical structure and body size, which has proved to be appropriate for high performance in the given sports. The intramural program is designed for maximum student participation and effective operations. A determined effort will be made to provide a well-organized and supervised program that is responsive to the needs of the students and faculty/staff members, offering them the opportunity to engage in athletic endeavors in individual and team sports. The intramural program is a team of individuals working together to provide high quality organized activities for the students, faculty, and staff. Talented and energetic people were selected to work together to achieve this goal. The game volleyball offers opportunities for the development of strength, endurance, speed, agility, and neuromuscular skills and immediate action with many precise educational outcomes. The game of volleyball requires a conditioning program, which...

Words: 2141 - Pages: 9

Premium Essay

Res 341 Final

...women in the sample used antibiotics more than 500 days in their lifetime. Further, 79% of these “heavy antibiotics users” developed breast cancer. According to the American Cancer Society, one in twelve women will develop breast cancer at some time in her life. Of the numbers mentioned, which are parameters? 3) Basic business research methods would be used to 4) The collection and summarization of the socioeconomic and physical characteristics of the employees of a particular firm is an example of 5) Which of the following is an example of statistical inference? 6) A logically conjectured statement that describes the relationship between two or more variables and is formulated for empirical testing is a 7) The variable that causes a measurable effect or change on the dependent variable is 8) Survey questionnaires may be effectively used for research to determine 9) A company is designing a survey to obtain information on the reliability of a product it sells. To obtain the most valid research information, who should the company send this type of survey to? 10) The following practice is considered ethical when conducting business research: 11) If a population distribution is skewed to the right, then given a random sample from that population, one would expect that the 12) Textbook Price Number of Textbooks $25 to $35 2 $35 to $45 16 $45 to $55 5 $55 to $65 7 $65 to $75 20 Estimate the standard deviation of the price of a textbook...

Words: 823 - Pages: 4

Free Essay

Porous Material Made Out of Al Scraps

...Faculty of Science School of Materials Science and Engineering Using Al6063 Chips to produce Porous Material by Powder metallurgy By YIFU FANG A thesis submitted for the Degree of Master of Engineering ACKNOWLEDGEMENTS I would like to express my special appreciation and thanks to my supervisor A/Prof. Sammy Chan who has been a tremendous mentor for me. I would like to thank you for encouragement of my research and guide me to learn how to think independently like a professional researcher. Your advice on both research as well as on my career have been priceless. And also appreciate the help from Andrew in ADFA who helped me to do the impact test and provided me plenty of background information about how the test worked. I really couldn't analyze the data without it. I would also like to thank our group member Andrew, Johnson and Alex who have assisted me to do the experiment and offer me some techniques for operating the experimental equipment. A special thanks to my family. Words cannot express how grateful I am. Thanks to you, I have this chance to study in this first class university and finally graduate. I would also like to express my gratitude to lab manager George Yang’s and Rahmat Kartono’s helps and trainings on my experiments. Thanks for all the supports from the the School of Materials Science and Engineering, UNSW Australia. ABSTRACT Recycling aluminium now is fairly popular in the world since more than 15% of the aluminium...

Words: 7001 - Pages: 29

Premium Essay

Effectiveness of Paper Charcoal as Fuel Source

...produces more heat than green wood but less than charcoal and thus prevents the lead evaporating.[1] White coal could be used mixed with charcoal for other industrial uses than lead smelting.[2] White coal was produced in distinctive circular pits with a channel, known as Q-pits. They are frequently found in the woods of South Yorkshire. Nowadays white coal is made from [3] * Groundnut shells * Cotton hulls and salks * Castor seed shells * Forest leaves; wood chips and shavings * Sugarcane bagasse * Rice husk and paddy straw * Mustard waste * Coir dust * Coffee husk * Sunflower waste * Maize stalks * Bajra cobs * Sesame seeds oil cake * Wheat straw Benefits of white coal:[4][5][6] * White coal is cheaper than coal and fire wood. * There is no sulphur in the white coal, therefore no toxic gases. * Moisture content is nil. * Biomass briquettes have a higher practical thermal value. * Briquettes have consistent quality, have high burning efficiency, and are ideally sized for complete combustion. * Combustion is more uniform compared to coal and boiler response to changes in steam requirements is faster, due to higher quantity of volatile matter in briquettes. * Low ash contents. * The calorific value of the finished briquettes is approximately 3500 to 4000 kcal/kg. India is fast becoming a major manufacturer and consumer of white coal. A large number of companies have switched their boiler...

Words: 1630 - Pages: 7

Premium Essay

Research Proposal Sample

...Table of Contents Working Title: 2 Introduction: 2 Aim and Objectives: 2 Methodologies for Data Collection: 3 Theoretical Framework: 3 Usage of HRIS in Organization: 4 Impact of HRIS on Human Resource Professionals: 4 Implementation issues of HRIS in Organization: 5 References: 5 Working Title: The role of Human Resource Information Systems (HRIS) in a Strategic Human Resource Management (SHRM) The proposal is to examine the concepts underpinning the role of human resource information systems and explores its application in circumstances of human resource strategies. The concepts of information systems involved in the SHRM are furnished to view for the practitioners. Introduction: An information system in human resource department is an emerging as a most important field of management. The quality and development of the contribution of information systems in strategic human management is measured that global competition, technological changes and the competitive advantages in an organisations are the primary motives towards the information systems. Fundamentally, this improvement in a human resource department is the imperative to prepare and develop in strategic of the human resource. According to the author Dessler (1999), in the field of human resource management (HRM), issues of the HRM is the major concerns at all levels of the managers. Strategic related in human resource management in an organisations plays a vital role in providing with the...

Words: 1416 - Pages: 6

Free Essay

Business Mgmt

... Table of Contents Section 1 – Mission and Philosophy Statement………………………………………………........................3 Section 2 – Goals and Objectives…………………………………………………………………………………………..….…...4 Goals………………………………………………………………………………………………………………………………………………4 Objectives……………………………………………………………………..………………….…………………………..……………6 Section 3 – Instructional Model……………………………………………………………………………………………………….8 Basketball…………………………………………………………………………………………………………………………..……….8 Flag Football…………………………………………………………………………………….………………..……………….....…10 Soccer…………………………………………………………………………………………………………………………………………...12 Volleyball…………………….………………………………………………………………………………………………….………….14 Floor Hockey………………………………………………………………………………………………………………………..……16 Softball………………………………………………………………………………………………………………………………………...18 Section 4 --Discussion Model…………………………………………………………………………………………………………….19 Obesity…………………………………………………………………………..…………………………………………………………….19 Bullying…………………………………………………………………………………………………………………………………………26 Section 5 --Personal / Social Responsibility and Participation Model………………………..27 Section 6 --Drugs and Alcohol……………………………………………………………………………………….…………………..28 Section 7 --Positive Impact of Athletics……………………………………………………………………………………….29 Section 8 – Program Consent Form………………………………………………………………………………………………..31 Section 9 – Curriculum…………………………………………………………………………………………………………………….…….32 *Section 10 –Youth Athletic Stats Pg. 29 *Section...

Words: 8158 - Pages: 33

Premium Essay

Balls & Business

...P E RF ORMANCE I NDIC ATOR ™ TECHNICAL OVERVIEW 2 GOLF BALL CONSTRUCTION AND THE EFFECT OF WATER ON A GOLF BALL 3 RESEARCH AND CONCLUSIONS (PAGE 4) 5 HOW WATER DAMAGE, UNAUTHORIZED REFINISHING, AND REFURBISHING AFFECT A GOLF BALL 6 HEAR IT FROM THE EXPERTS 8 ARTICLE LINKS 9 DID YOU KNOW THAT THE USGA REGULATES DISTANCE? 2 GOLF BALL CONSTRUCTION The two final layers or coatings of golf ball construction include a primer and a “protective” gloss coating. The primer, in most cases, is water-borne polyurethane and the final layer of protective gloss coat is generally a two-part solvent-based polyurethane. The protective coating is designed to be water permeable. When a golf ball is struck, it creates micro-cracks, allowing for increased passage of humidity/water. To prevent macro cracking or bubbling of the protective gloss coat, the coating must be designed to allow water to flow freely.The core or “engine” Golf ball construction is generally broken down into four main types: LIQUID CENTER Construction: Small rubber or plastic core filled with liquid, surrounded by rubber windings tightly wrapped around the core. Primary cover materials include Balata, urethane or elastomer. Models Include: Maxfli Elite, Slazenger Pro Preferred, Titleist Professional, Titleist Tour Distance. Players: Tour Pros and and low handicap amateurs looking for control and feel around the greens. SOLID CORE WOUND Construction: Large...

Words: 3187 - Pages: 13

Premium Essay

Small Business

...UNIVERSITY OF WALES LINGNAN INSTITUTE OF FURTHER EDUCATION BSC 107 MARKETING ESSENTIALS Ho Lee Fish Ball Company LAM Wing Sze (9686144) Content 1. Executive Summary | P.3 | 2. Background – Ho Lee Fish Ball | P.4 | 3.1 SWOT analysis | P.6 | 3.2 Strengths | P.6 | 3.3 Weaknesses | P.8 | 3.4 Opportunities | P.9 | 3.5 Threats | P.9 | 3. Marketing Mix | P.10 | 4. Recommendations | P.13 | 5. References | P.14 | Executive Summary Ho Lee Fish Ball is a small business which is operated by producing fish balls and selling fish balls since1950. The company was initially run as a family business, till today, Ho Lee has setup its own factory, and its products are mainly retailed to Yuen Long, Tin Shui Wai, Tuen Mun and Tai Po. Its target customers are mainly focus on middle level income. The company wants to expand its business into a new market and increase the profit and competitive advantages. However, due to the retail stores rent continuously increasing, it affected the company hardly to open another store in Hong Kong; some of the markets are lack of operators, so even have a store with reasonable price, it also have high risk to start the business in those markets, such as Mong Kok; Besides, the prices of fishes and other raw materials also increased the cost, because of over fishing and too many competitors, both had dropped with the quality and quantity of fishes. In this report, I found the...

Words: 2944 - Pages: 12

Premium Essay

Nivia Case Study

...To focus on one of their marketing strategies i.e Online marketing. 5. To understand what is the process in Online marketing and learn about the marketing strengths. 6. To learn about the sales and distribution structure and marketing structure CHAPTER 3 Research Methodology 4.1Research Methodology Research methodology is a way to systematically solve the research problem. In it, we learn the various steps that are generally adopted by a researcher in studying his research problem along with the logic behind them. Primary Information: The primary information was collected during my trainings through my internship. The members of my team took me through the concept of Online marketing and the various processes related to the same. I also collected data from the various documents that were provided to me by the firm which they had prepared . Majority of the primary information was collected through observations and interactions within the team. Secondary Information: The secondary information was collected through the website of the firm, journals, books and other relevant sources online. CHAPTER 8 8.1 Comparison Line Nivia soccer balls with reference to other brands with Flipkart FLIPKART...

Words: 1444 - Pages: 6

Free Essay

International Human Resource Management

...│ CREDIT RESEARCH │ Wednesday │ 20 September │ 2006 Summary Financials (USD mn) 2003 Sales Gross Profit EBITDA Net Profit Fin Debt Equity Operating CF Free CF 160.3 32.8 14.8 8.4 9.7 43.4 12.3 (2.9) 2004 204.7 69.2 47.4 29.9 16.9 82.4 7.7 (11.3) 2005 249.7 82.8 52.1 30.9 50.7 96.3 21.1 2006E 279.6 94.0 61.0 34.8 153.9 129.2 45.4 No. 1 in the Russian ball bearing industry European Bearing Corporation (EBC) controls 37% of the Russian ball bearing market. EBC operates five ball bearing plants in Russia and one in Kazakhstan and produces more than 2,700 types of ball bearings for more than 500 customers. EBC controls 98% of Russia’s high-precision (aviation) ball bearing market and 95% of the railroad ball bearing market. These two business segments accounted for 65% of EBC’s revenues in 2005. Long-term relationship with Russian Railroads The company has a supply contract worth USD560 mn with Russian Railroads that secures EBC average annual revenue of USD100 mn to 2010. (23.2) 19.3 Source: Company data 2004 34% 23% 15% 0.4 35.0 2005 33% 21% 12% 0.9 13.7 Ratios 2003 Gross Margin EBITDA Margin Net Margin Debt/EBITDA EBITDA/Int. Expense Financial Debt/Equity 20% 9% 5% 0.7 22.8 0.22 Solid financial standing, moderate leverage In 2005, EBC reported revenues of USD250mn, up 22% y-o-y. EBITDA margin stood at 21%, while the debt/EBITDA ratio was only 0.9. Factoring in the planned CLN issue, debt/EBITDA should not exceed 2.5 at year-end 2006, and gradually decline...

Words: 13583 - Pages: 55

Premium Essay

Tma 06 Floating and Sinking Report

...study was to observe how children apply mathematical and scientific reasoning to various objects that sink or float. The study was designed to test the hypotheses that social interaction is related to cognitive change, that children progress through developmental stages in an understanding of science. Two children were used for the investigation a boy aged eleven and a girl aged six. The data was collated from video-recorded tasks. The participant’s predictions and explanations were coded. Findings revealed that when the children experienced cognitive conflict or were challenged by the researcher this could cause conceptual change, leading to a developmental progression in the children’s scientific thinking. INTRODUCTION Considerable research exists on the mathematic and scientific thinking of children. Selly, N (1993) proposed a developmental progression of children’s scientific understanding, relating to floating and sinking. Selly argues that young children have a very practical view of buoyancy. As children realise that their explanations are insufficient, they progress through a series of what Selley termed Hypotheses from 1, 1A,2,3,and 4. Cognitive changes in the development of mathematical and scientific concepts are Piaget’s discovery learning, this occurs when children are lone learners working mostly on their own. To get children to progress with their thinking Paiget and his colleagues would challenge pupils and their thinking creating conflict and producing disequilibrium...

Words: 3568 - Pages: 15

Premium Essay

Bfbbf.Doc

...cognitive development Cognitive development is looking at the way children learn and process information. Jean Piaget (1896-1980) was a psychologist looking into the development of cognitive processes; his research is still highly influential today for studies carried out on cognitive development in children. Piaget believed intelligence is the balance which a person achieves between themselves and the environment and that this was achieved by the actions on the world of a young person who is developing. Piaget constructed several concepts to define the stages of child development; he was fascinated by the way that all children seemed to go through the same stages of discovering the world at the same time. Piaget’s research suggested a stage theory on each stage the children had a distinct type of thinking. The first stage of four which Piaget defines is the sensorimotor stage (0-2 years). The baby is able to understand the world by using its senses and motor actions. They are able to pretend to play and use single words towards the end of its sensorimotor stage. An important feature of the sensory motor stage is object permanence and the development of this. Learning that objects do not disappear when they are out of sight. However there are problems with Piaget’s research on this stage of development, this has been discovered by other researchers carrying out studies using heart-rate, rate of sucking and habituation technique. Bower (1982) discovered that a child of three...

Words: 1245 - Pages: 5