What Is Moment of Inertia in Physics

The moment of inertia of an object is a calculated measure for a rigid body that is undergoing rotational motion around a fixed axis: that is to say, it measures how difficult it would be to change an objects current rotational speed. That measurement is calculated based upon the distribution of mass within the object and the position of the axis, meaning that the same object can have very different moment of inertia values depending upon the location and orientation of the axis of rotation. Conceptually, moment of inertia can be thought of as representing the objects resistance to change in angular velocity, in a similar way to how mass represents a resistance to the change in velocity in non-rotational motion, under Newtons laws of motion. The moment of inertia calculation identifies the force it would take to slow, speed up or stop an objects rotation. The International System of Units (SI unit) of moment of inertia is one kilogram per meter squared (kg-m2). In equations, it is usually represented by the variable I or IP (as in the equation shown). Simple Examples of Moment of Inertia How difficult is it to rotate a particular object (move it in a circular pattern relative to a pivot point)? The answer depends on the shape of the object and where the objects mass is concentrated. So, for example, the amount of inertia (resistance to change) is fairly slight in a wheel with an axis in the middle. All the mass is evenly distributed around the pivot point, so a small amount of torque on the wheel in the right direction will get it to change its velocity. However, its much harder, and the measured moment of inertia would be greater, if you tried to flip that same wheel against its axis, or rotate a telephone pole. Using Moment of Inertia The moment of inertia of an object rotating around a fixed object is useful in calculating two key quantities in rotational motion: Rotational kinetic energy: K Iω2Angular Momentum: L Iω You may notice that the above equations are extremely similar to the formulas for linear kinetic energy and momentum, with moment of inertia I taking the place of mass m and angular velocity ω taking the place of velocity v, which again demonstrates the similarities between the various concepts in rotational motion and in the more traditional linear motion cases. Calculating Moment of Inertia The graphic on this page shows an equation of how to calculate the moment of inertia in its most general form. It basically consists of the following steps: Measure the distance r from any particle in the object to the axis of symmetrySquare that distanceMultiply that squared distance times the mass of the particleRepeat for every particle in the objectAdd all of these values up For an extremely basic object with a clearly-defined number of particles (or components that can be treated as particles), its possible to just do a brute-force calculation of this value as described above. In reality, though, most objects are complex enough that this isnt particularly feasible (although some clever computer coding can make the brute force method fairly straightforward). Instead, there are a variety of methods for calculating the moment of inertia that are particularly useful. A number of common objects, such as rotating cylinders or spheres, have a very well-defined moment of inertia formulas. There are mathematical means of addressing the problem and calculating the moment of inertia for those objects which are more uncommon and irregular, and thus pose more of a challenge.

Research Methods - 1483 Words

Analyze of research in averagely can be accounted as an aim for understanding or a systematic study in search of information to shape or accept achievable facts. There are two mainly different ways of research. First, there is the basic research that appears not to go into the study field and the second, way is the applied research that studies given area into the aspect. It applies to resolve, understand and advance the methods and systems that are used in the search for human understanding of abnormal matters to do with the society. Research also can apply to advance the scientific and technical levels of knowledge that are applicable in the society. Other research challenges may apply to raise the information and knowledge about nature,†¦show more content†¦These methods are also applied in mathematical sciences like Chemistry and Physics but the experimentation here is limited. The results from this type of research methods are convinced through statistics, graphs and ta bulations. Although, quantitative research methods have the limitation that they tend to neglect and ignore the non-measurable actors, which may be of great consequence to the hypothetical relationships. Although this limitation is overcome by applying the qualitative research techniques in explaining the quantitative accounts that are accumulated from quantitative methods. This mode of using the two types of research techniques is referred as the Mixed-Research Technique. (Becker 1994, 53-71) The distinctions between qualitative and quantitative research methods; The term qualitative applies to the fact that the data collected is non-numerical, while quantitative means that the data collected can be quantified into numbers or numerals. An example of a qualitative research method is one that relates the environment of individuals and the character that they develop over time. The data collected from this research will be convinced in terms of answers where one may hypothesize that, children who are brought up in slums grow up to become deviant adults. The qualitative cause affects relationship here is between deviance and the slum upbringing. A good example of a quantitative research method is one that seeks to establish theShow MoreRelatedResearch Methods And Methods Of Research975 Words   |  4 PagesStudying research method was not a new experience since I have studied about it in my under graduate school. In comparison from the previous one I had, ULMS 515 Applied Re search Methods Module has enhanced my understanding about how to conduct a research in an appropriate way to be implemented in the real world setting. I learned to appreciate the nature of research and the research process in academic and practical contexts. This module also enables me to develop my understanding in the differencesRead MoreResearch Methods For A Research Method1925 Words   |  8 PagesResearch methods assignment LQXIH1 This assignment will be comparing and contrasting two journal article’s, with a focus upon the research methods used. It will begin by summerising the main findings and key arguments of both articles. Followed by identifying the research methods used, whilst comparing and contrasting their strengths and limitations. It will then move onto looking at how the methodological limitations of each study may be overcome. To conclude this essay a reflection shall be carriedRead MoreResearch Methods4920 Words   |  20 PagesIntroduction of research and research methods What is research method? As a matter of fact, according to Saundra et al. (2003), the term method in the entire research process or project can be considered as tool or technique which help researcher obtain, collect and analyze data or different types of information. To be more specific, Saundra et al. (2003) point out that in order to fulfill different research projects and objectives, couples of methods have to be properly utilized, in this caseRead MoreResearch Methods1611 Words   |  7 Pagesï » ¿Assignment in Research Methods 1) Overview of various research methods When writing a Research Paper it is important to know different research methods. These methods help to gather and systemize the information and data in order to scientifically prove the validity of the work. Further will be explained ways how to collect the data. Research methods are divided in two big blocks: quantitative and qualitative. Quantitative methods are those where results are explained in numbers, whereasRead MoreQualitative Research On Research Methods Essay839 Words   |  4 PagesThis type of research methods involve describing in detail specific situation using research tools like interviews, surveys, and Observations. Qualitative Research is primarily exploratory research. It is used to gain an understanding of underlying reasons, opinions, and motivations. It provides insights into the problem or helps to develop ideas or hypotheses for potential quantitative research. Qualitative Research is also used to uncover trends in thought and opinions, and dive deeper into theRead MoreResearch Methods And Methods Of Interdisciplinary Research Essay1297 Words   |  6 Pagesof analysis there are three ways in which to think and feel while doing interdisciplinary research. The first is that the knowledge we use that has been previo usly published was done by hard working researchers using sound research methods. Secondly we should acknowledge that not all information is current and we might find research that has been biased in some way. On the other hand, there may be research that is cutting edge and therefore has not been tested sufficiently and may be controversialRead More Research methods Essay1402 Words   |  6 Pages Research method To gain my secondary information I used such sources as the Internet, books and midwifery journals. My secondary information will consist of the benefits of breast-feeding for the mother and baby, the benefits of bottle-feeding for the mother and baby as well as statistics on breast-feeding. All information that I have gained for my secondary data is all reliable, because it has come from recommended sites, books and journals that have been approved from the Government or from hospitalsRead MoreMethods And Methods Of Qualitative Research1057 Words   |  5 PagesMethod Approach Qualitative research is normally recognizable via the use of methods that include, in-depth interviews and group moderation techniques; a particular objective to answer is â€Å"why?† and â€Å"how?† (Bailey, 2014). One of the great benefits of the qualitative research method is that it offers a wide range of approaches that can be used to capture data. In order to ensure credibility, two approaches will be used to conduct this research. The ethnographic approach will be used to understandRead MoreResearch Methodology For Research Methods Essay2303 Words   |  10 PagesSurvey research methods are one of the most widely used research methods in education. This non-experimental, quantitative research design is most often used to gather information about the subject’s attitude, beliefs, opinions, or similar types of information (McMillian Schumacher, 2010). With this method, the researcher selects a sample of subjects and either administers a questionnaire or con ducts interviews to collect data from the subjects. There are several benefits to using surveys in educationalRead MoreEssay on Research Methods1060 Words   |  5 Pages(Zikmund, 2003) states that exploratory research should be used to clarify ambiguous problems. Management may have discovered general problems but research is needed to gain better understanding of the dimensions of the problems. This study aims at exploring and delving into the underlying factors of why organisations struggle to attract and retain talent using the employer brand. The challenges of talent management are well known and are applicable to all players, there is a possibility that

Cyber Cafe Management Essay Sample free essay sample

I. Purpose and Scope of the StudyThe intent of the undertaking is to automatize cyber coffeehouse. The package must include commissariats to maintain user inside informations and login history. It should assist the cafe proprietors to recover user inside informations when needed and internet use in the system. It should be capable of apportioning cabins automatically. It should assist the cafe proprietor in ciphering day-to-day use of the systems and income. The system we propose has great range in the current existent clip state of affairs. The cyber offense monitoring system can be enhanced to an extent by implementing this system. Most of the houses and constitutions are being computerized in order to ease the undertakings to be performed. The cyberspace cafes unluckily are seldom computerized. We aim through this venture. a better dependable solution. II. Description of Present Situation Soon. most of the maps in the Cyber cafes are done manually. Even though there are LAN connexions and an decision maker system. an machine-controlled system is non introduced. The proprietor records the inside informations of the clients. login and logout clip. cabin and has to cipher the sum. All these inside informations are written in book. Besides there is no particular system to apportion cabins expeditiously. The proprietor besides has to cipher the entire income of a twenty-four hours. The present system has following restrictions: * Restrictions in study coevalss * Manual recording consumes extra clip* Opportunities of mistake* Trouble in apportioning cabins* The retrieval of information sing a client is clip devouring * Lack of charge system and manual computation of day-to-day income * Repeated recording of frequent user inside informations III. Problems and RequirementsIn the present scenario the cafe proprietor keeps a paper book to maintain path of user inside informations. Manual processing of informations is ever clip devouring and may perpetrate more mistakes. There is much trouble in apportioning cabins to the users. Further mention to the user inside informations is clip devouring. Accuracy of such informations makes the system undependable and inefficient. Obviously there is demand of an efficient system. IV. Objective of the new System The aim of this package is to keep the inside informations of users. cabins and login history. Through this system we provide installation of prepaid and postpaid histories severally for Account Users and Walkthrough Users. It has the characteristics like adding. sing. redaction of user inside informations. cabin inside informations. recharge option for prepaid users. charge. duty scenes. etc. V. Possible Alternative In present state of affairs of Cyber Cafe . the Administrator manually records the inside informations of the clients log in. log out clip and cabin. Besides. He has to manually cipher the sum of clip consumed and the fees to be paid by the client. The entire income of a twenty-four hours must besides be calculated by the proprietor. Because of these. we planned a possible alternate to restrict the opportunities of mistakes particularly in computation of fees and entire income. And to avoid redundancy in entering frequent user inside informations. The current system is an application plan that provides a better manner of direction of cyberspace coffeehouse. Users those who have an history with the system are entertained. Creation of history is nevertheless really easy. thereby enhances the dependability of the system. Criteria| Weight| Candidate 1| Candidate 2|Operational Feasibility| | | |PerformanceInformationEconomyControlEfficiencyServices| | The admin manually records the clients log in. log out clip and the Cabin. The information about the clients is non recorded. The cyber cafe purchase supplies needed for the recording of use and calculation of net incomes. Trouble in managing disobedient and hardheaded clients. Manually entering of inside informations and calculation of net income is clip devouring. Word processing. Online and Offline games and Internet Services. | User-friendly bill of fare will assist both the decision maker and the clients to work on it without any operational trouble. It can recover information of the clients easy. The cafe will non pass much because most of the engineerings used are freely available in their store. Merely customized merchandises had to be purchased. The system allows clients to take whether to log in as an history user or a walkthrough user. The oper ation is automated. Word processing. Online and Offline games. Internet Services. Account user and Walkthrough user. | Technical Feasibility| | Manually Operated. | This system is developed in JAVA linguistic communication with My SQL as backend. The Software powered by JAVA assures clear and efficient services to the bureau. The database is driven by My SQL therefore supplying portability. | Schedule Feasibility| | 1-2 hebdomads. | 4-6 months. | Standards for ComparisonVI. Analysis Of Alternative A. Existing Operational CostTable 1. UtilitiesDescription| Monthly Cost| Annual Cost|Electric Bill| | | Table 2. SuppliesDescription| Quantity| Unit Price| AnnualCost|Calculator | 1| P665| P665|Ballpen ( HBW ) | 1 personal computer. | P5| P120|Log Book| 1 personal computer. | P70| P420|Wall Clock| 1| P120| P120|Battery for Clock| 1 pack| P195| P195|Bell| 1| P85| P85| Table 3. ForcesJob Description| Personnel on Job| Monthly Salary| AnnualSalary| Administrator| 1| P3. 000| 36. 000|Assistant| 1| P2. 500| 30. 000| *Refer to Appendix I for extra descriptions and beginning B. Proposed Operational CostTable 4. UtilitiesDescription| Monthly Cost| Annual Cost|Electric Bill| | | Table 5. ForcesJob Description| Personnel on Job| Monthly Salary| AnnualSalary| Administrator| 1| P3. 000| 36. 000| *Refer to Appendix II for extra descriptions and beginning C. Proposed Develpoment CostTable 6. New Hardware and Accessory for the installing of waiter computing machine Description| Unit Price|Samsung Led Monitor| P4. 600|System Unit- HP PAVILION P6-2112D/ CORE I3-2120| P13. 500| Keyboard| P200|2. 4Ghz Wireless Mouse| P240|Mitsui AVR| P850|Speaker| 1. 800| Table 7. ForcesJobDescription| Personnel on Job| Salary/ hour| Total Salary| Programmer| 1| P300/250 hours| P75. 000|GUI Designer| 1| P250/200 hours| P50. 000|Network Administrator| 1| P350/25 hours| P8. 750| Table 8.System Cost| P 15. 000| *Refer to Appendix III for extra descriptions and beginning D. Benefit E. Payback AnalysisCash flow| Year 0| Year 1|Development cost| ( 163. 750 ) | |Operational cost| | ( 39. 000 ) |Present Value| 1| 0. 9090|Time Adj. Cost| ( 163. 750 ) | ( 35. 451 ) | Accumulative Cost| ( 163. 750 ) | ( 199. 201 ) | | | |Benefits| 0| 723. 072|Time Adj. cost| 0| 657. 272|Accumulative Benefits| 0| 657. 272|| 163. 750| 458. 071| E. Net Present ValueCash flow| Year 0| Year 1| Total| Development cost| ( 163. 750 ) | | | Operational cost| | ( 39. 000 ) | | Discount 10 % | 1. 0000| 0. 9090| | Present Value| ( 163. 750 ) | ( 199. 201 ) | | Time Present Value of a life-time Cost| | | 362. 951| | | | | Benefits| 0| 723. 072| |Discount 10 % | 1. 000| 0. 9090| | Present Value Annual Benefits| 0| 657. 272| | Total Present Value of a Lifetime Benefits| | | 657. 272| Net Present value of this Alternative| || 294. 321| E. Return of Investment AnalysisLifetime Benefits-Lifetime CostLifetime Cost= ( 657. 272-362. 951 ) 362. 951= 81. 09 % VII. RecommendationThe undertaking entitled â€Å"Cyber Cafe Management System† is a package bundle. which can be used in cyber cafes for pull offing the clients’ computing machine expeditiously. Now a day’s cyber terrorist act. which is chiefly undergone through cyberspace cafes. necessitate to be tackled decently. Thereby. it is so necessary to hive away the valid information of the user who comes for internet entree. The system being used. the clip at which the user logs in and logs out should be recorded consistently. The major advantage of computing machine is its velocity that makes it able to give some utile information really rapidly. This velocity besides opens new attacks to job resolution and information processing. Another characteristic is its truth. It besides provides high security to the system and therefore unauthorised user can be prevented. And in conclusion. easiness of operation for the proprietor. We greatly recommended this system for better managing of cyber cafes and prevent users from perpetrating cyber offense. VIII. AppendixIn this modern epoch. a figure of people entree the cyberspace often by agencies of cyber coffeehouse. For such frequent users. a prepaid history shall be maintained and discounted rates may be charged from them. While walkthrough users. who are less frequent. are charged a fixed rate. By utilizing the LAN connexions in the cyber coffeehouse we can automatize this procedure really easy. This system comprises of the undermentioned faculties: * The Server Module * The Client ModuleThe waiter faculty. which is handled by the decision maker can make new histories for prepaid users and besides store the inside informations of walkthrough clients. While in the client faculty. which is handled by users themselves. the user should give his/her user-id and watchword to get down browse. After they are logged out. the clip and sum will be automatically generated atthe waiter faculty and the measure is provided to the user. This system is developed in JAVA linguistic communication with MySQL as backend. The system is a bill of fare driven one.

Theodore Roosevelt Essays (417 words) - , Term Papers

Theodore Roosevelt Theodore Roosevelt was one of the most successful presidents in the United States history. He achieved many goals in life. Some of these goals were as follows: 1) He won the Spanish-American War; 2) He won the Nobel Peace Prize; 3) He was the youngest president in United States history. He also had other positions in life such as: 1) He was a Historian; 2) Politician; 3) Cowboy; 4) Buffalo Hunter; 5) Crime Fighter; 6) Reformer; and 7) a Calvaryman. Theodore Roosevelt was born in 1858 and died in 1919. He became President of the United States when President McKinley was assassinated. President Roosevelt served in office from 1901-1909. During the Spanish-American War Theodore Roosevelt served as a Lieutenant Colonel of the Rough Riders Regiment. Lieutenant-Colonel Roosevelt and his regiment led the charge up San Juan Hill, which became the most famous battle of the war. That charge made Lieutenant-Colonel Roosevelt a national war hero. Under President Roosevelt the Panama Canal was built. Panama at the time was a providence of Colombia. President Roosevelt had a good way of getting a cheap price for the canal. He organized a revolution in Panama against Colombia. As a result of the revolution the United States recognized Panama as a country and was their protector. As the protector of Panama the United States got a permanent land grant of ten miles for the Panama Canal Zone. Those methods in which President Roosevelt used to gain the rights over the canal proved to be ingenious even though his opponents did not approve of them. But most of the American population approved of his methods. Roosevelt had an aggressive foreign policy. He created the Roosevelt Corollary which said that the U.S. was not interested in gaining more land. The U.S. only wanted to see other countries around them be stable. It also stated that if their countries collapsed inviting intervention of other countries that were stronger, then the U.S. would act as an international police power. TR was also a peacemaker. He made a compromise between Russia and Japan to stop the war that was going on between the two countries. This ensured a balance of power in Asia. This action one Roosevelt the Nobel Peace Prize. So as everyone can see Theodore Roosevelt was one of the greatest presidents in U.S. history. As well as the youngest he achieved many goals and defined the definition of the American dream. History Essays