# ENGR 2311: Engineering Statics Fall 2015

## Comments

## Transcription

ENGR 2311: Engineering Statics Fall 2015

THE UNIVERSITY OF CENTRAL ARKANSAS! DEPARTMENT OF PHYSICS & ASTRONOMY [email protected] Instructor NJ Austin Textbook Hibbeler, Engineering Mechanics: Statics (13th edition) 501.450.5910 ISBN-10 0-13-291554-5 ISBN-13 978-0-13-291554-0 http://faculty.uca.edu/njaustin/ENGR2311 No Blackboard. Ever. Course Web Lecture MWF 8:00–8:50AM LSC 161 Office Hours (LSC 014) MWF 9:00AM–10:00AM MWF 11:00AM–12:00PM Available at other times by appointment Course Supplies Scientific calculator, quadrille-ruled engineering paper ENGR 2311: Engineering Statics Course Objectives There are many purposes for an engineering statics class, most of which have very little to do with the actual physics. First, then, the physics: You will be learning that objects in equilibrium have no unbalanced forces or torques (That's it. Really.). Secondly, and in no particular order, you will also be: • Gaining familiarity with working numerically: Accuracy, precision, and units. If you think this isn't important, then I expect to see your names in the newspaper as the engineers responsible when the next interplanetary probe crashes uselessly into Mars because the U.S. design team could not tell the difference between English units and the internationally accepted SI units used by the European engineering team. • Learning to use your tools: You probably have a sophisticated graphing calculator. While we won’t necessarily be using those graphing functions much (if at all), the calculator can also be used to quickly perform some of the more tedious tasks (I.e., solving systems of linear equations) that occur with predictable regularity in this (and most other engineering) courses. • Mastering the problem solving process: You will be solving problems. It’s crucial to know how to use your tools, but even more important to recognize that the calculator is not solving the problem, you are. You will never, in your professional career, see an actual statics problem exactly like the ones you solve this semester. But you will, every single day of your professional life, have real problems to solve. • Getting used to an alarming lack of partial credit: Every problem has an answer. Occasionally, a problem may have more than one acceptable answer or maybe a range of possible values. But there's going to be a number at the end of every problem. And as clichéd as it may be, you don't get half fired if only half your bridge collapses. The judge isn't going to cut the punitive damages award in half because your defective product only severed one of the plaintiff's arms. You need to get used to getting the right number at the end of the problem. And frankly, a zero on a homework problem is a lot less consequential than a multi-million dollar product liability judgement. • Making it through to the next round: Engineering Statics has traditionally been used as a make-or-break course for beginning engineering students. While I don't agree with making a course overly difficult intentionally, just trying to make people fail, you need to keep this in Fall 2015 mind: It does not get any easier than this. Whatever particular branch of engineering you choose, any class you pick at random from the catalog of any College of Engineering at any university will be harder than this one. I promise. Lecture You should attend lecture because it's the right thing to do. You should also plan to attend every lecture because there will be something to hand in every time. I will not be delivering much in the way of traditional lecture; you should expect to be working problems actively during the majority of class time. You should always bring your textbook, calculator, paper, and pencil. Participation You will be allowed to earn 10% of your course grade through inclass participation. Participation will consist of presenting, both individually and with partners, example problem solutions. You will be expected to clearly demonstrate your solutions to the class in a brief, but complete fashion. You should expect to present one problem to the class per week,. You will be allowed to co-present with a partner if you choose, up to (but not more than) five times. Homework Homework problems are listed on the course calendar. You are responsible for knowing which problems are assigned, and when they are due. I recommend completing as many of the problems as possible. One problem will be collected for grading each lecture. You may continue to submit problems to be graded until you have reached the maximum. Once you have reached the maximum, you should keep doing problems, but you cannot earn any extra credit points by submitting them to be graded. Homework problems must be set up neatly and completely. You should work on either green engineering paper or blank, unruled paper. Notebook paper is not acceptable, and regular graph paper is not a good choice either. Your homework submission should include a neat sketch (use a ruler for straight lines), completely and clearly labeled. The problem must be set up symbolically using the same set of variables as you labeled on your sketch. You must include enough mathematical detail to demonstrate that you have actually solved the problem. Finally, the numeric answer should be clearly visible, accurately labeled, and include the appropriate units. If necessary, I will invoke point penalties for neatness and/or format problems. Submitting work which has been transcribed from a Solutions Manual is prohibited, and will be treated as seriously as any other infraction of academic integrity. “THE SCIENTIST DESCRIBES WHAT IS, THE ENGINEER CREATES WHAT NEVER WAS.”! —THEODORE VON KARMAN ENGR 2311: STATICS! FALL 2015 Homework must be submitted at the beginning of the lecture period when it is due. No homework papers will be accepted at the end of the period, and no late homework will be accepted for any reason. If you miss one, just keep working and get the next one handed in on time. There are more than 30 homework problems on the calendar, so you should have ample opportunity to earn maximum points. You may submit more than one problem per lecture period, but you may not submit more than four problems per chapter. Quizzes There will be a quiz every Friday. There may also be random quizzes on random days. If you complete more than 10 quizzes, only the highest 10 scores will be counted toward your grade. No make up quizzes will be given. If you miss a quiz, you should consider any quizzes beyond Quiz 10 as make ups. Exams The exams will each cover two chapters from the text. There is no comprehensive final exam (Exam 5 will take place during the final exam time slot, but will cover only the final two chapters). Exams will be closed book, and you will be allowed to use a calculator. They will consist of problems similar (but not identical) to those solved in class or collected as homework. Grades You are expected to keep all graded material and keep track of your own point progress over the course of the semester. I will be happy to correct any bookkeeping errors, but you must be able to document the error with the original graded work. You will be given your point total and grade average after each exam. If you need to know your grade at any time, please e–mail me, and I will promptly send you your current point total. Points may be earned in the following ways: Homework 30 problems @ 8 points each 240 points Participation 10 problems @ 10 points each 100 points Quizzes 10 quizzes @ 16 points each 160 points Exams 5 exams @ 100 points each 500 points Semester grades will be assigned using the following scale: There is no extra credit available. There is no extra credit available. I tell you three times, and what I tell you three times is true: There is no extra credit. Course Web Grade Minimum Points Maximum Points A 890 1000 B 790 889 C 690 789 D 600 689 F 0 599 This course does not use Blackboard. Ever. All course information, current calendars, review material, homework, quiz and test solutions are posted on the course web, located at: http://faculty.uca.edu/njaustin/ENGR2311 SYLLABUS! Personal Electronic Devices Mobile device use is strictly prohibited during lecture. You are not permitted to use any device capable of internet connection as a calculator during quizzes or exams. Texting, browsing, and posting to social media are both rude and disruptive, and are not acceptable during class time. If your telephone rings during an exam, you will be required to submit your exam and leave the room immediately. Please be respectful and considerate of your fellow students. No exceptions to this policy will be made for any reason whatsoever. Academic Integrity The University of Central Arkansas affirms its commitment to academic integrity and expects all members of the university community to accept shared responsibility for maintaining academic integrity. Students in this course are subject to the provisions of the university's Academic Integrity Policy, approved by the Board of Trustees as Board Policy No. 709 on February 10, 2010, and published in the Student Handbook. Penalties for academic misconduct in this course may include a failing grade on an assignment, a failing grade in the course, or any other course-related sanction the instructor determines to be appropriate. Continued enrollment in this course affirms a student's acceptance of this university policy. Collaboration is very strongly encouraged on everything except exams and quizzes (and you may even be allowed to consult each other occasionally on quizzes). Any collaboration on exams is strictly prohibited, and will result in, at the minimum, a course grade of F, and referral to the Dean of Students for further disciplinary action. Submitting work which has been transcribed from a Solutions Manual is also prohibited, and will be treated as seriously as any other infraction of academic integrity. It is also a matter of academic and personal integrity to take responsibility for withdrawing yourself from this course, if the situation requires it. The last day for unrestricted withdrawal with a W is 10/30/15. The final date for withdrawal with a grade of WP or WF is 11/30/15. Student Evaluations Student evaluations of a course and its professor are a crucial element in helping faculty achieve excellence in the classroom and the institution in demonstrating that students are gaining knowledge. Students may evaluate courses they are taking starting on the Monday of the last week of instruction (11/30/15) through the end of finals week by logging in to myUCA and clicking on the Evals button on the top right. Building Emergency Plan An Emergency Procedures Summary (EPS) for the building in which this class is held will be discussed during the first week of this course. EPS documents for most buildings on campus are available at http://uca.edu/mysafety/bep/. Every student should be familiar with emergency procedures for any campus building in which he or she spends time for classes or other purposes. Title IX Disclosure If a student discloses an act of sexual harassment, discrimination, assault, or other sexual misconduct to a faculty member (as it relates to "student-on-student" or "employee-on-student"), the faculty member cannot maintain complete confidentiality and is required to report the act and may be required to reveal the names of the parties involved. Any allegations made by a student may or may not trigger an investigation. Each situation differs and the obligation to conduct an investigation will depend on those specific set of circumstances The determination to conduct an PAGE 2/3 ENGR 2311: STATICS! FALL 2015 investigation will be made by the Title IX Coordinator. For further information, please visit: http://uca.edu/titleix. *Disclosure of sexual misconduct by a third party who is not a student and/or employee is also required if the misconduct occurs when the third party is a participant in a university-sponsored program, event, or activity. Course Calendar Week Monday Wednesday Friday Syllabus, Course Policies Chapter 1: General Principles Aug 17–21 Aug 24–28 Ch 2.1-2.4: Vector Operations Due: 1.(4, 8, 12) (16, 20) Ch 2.5-2.9: Cartesian Vectors Due: 2.24, 48, 56 Quiz 01 Ch 3.1-3.2: Free Body Diagrams Due: 2.76, 108, 136 Aug 31–Sep 04 Ch 3.3 Coplanar Force Systems Due: 3.20, 24, 32 Quiz 02 Ch 3.4: 3d Force Systems Due: 3.44, 48, 56 Exam 01: Chapters 02 and 03 Due: 3.60, 64, 76 Sep 07–11 Labor Day Holiday: No Class Ch 4.1-4.3: Moment of a Force Due: 4.4, 8, 16 Sep 14–18 Ch 4.6-4.7: Moment of a Couple Due: 4.68, 80, 96 Ch 4.8-4.9: Distributed Loads Due: 4.100, 108, 128 Sep 21–25 Ch 5.3-5.4: 2- and 3-Force Members Due: 5.12, 24, 32 Ch 5.5-5.6: Equations of Equilibrium Due: 5.40, 52, 56 Sep 28–Oct 02 Exam 02: Chapters 04 and 05 Due: 5.80 Ch 6.1-6.2: Method of Joints Due: 6.8, 12, 16 Oct 05–09 Ch 6.5: Space Trusses Due: 6.52, 60 Ch 6.6: Frames and Machines Due: Any multiple of 4, 6.64-116 Oct 12–16 Ch 7.2: Shear & Moment Diagrams Due: 7.44, 52, 60 Ch 7.3: Distributed Loads Due: 7.72, 84, 90 Oct 19–23 Exam 03: Chapters 06 and 07 Due: 7.116, 120 Ch 8.1-8.2: Dry Friction Due: Any multiple of 4, 8.8-56 Oct 26–30 Ch 8.3-8.4: Wedges & Screws Due: 8.64, 68, 80 Ch 8.5-8.7: Belts & Bearings Due: 8.92, 104 Nov 02–06 Ch 9.1: Center of Mass/Gravity Due: 8.128, 132 Ch 9.2-9.3: Pappus & Guldinus Due: 9.16, 28, 48 Nov 09–13 Ch 9.5: Fluid Pressure Due: 9.100, 112 Exam 04: Chapters 08 and 09 Due: 9.120, 124 Nov 16–20 Ch 10.3, 10.4: Radius of Gyration Due: 10.28, 44, 48 Ch 10.5-10.6: Product of Inertia Due: 10.60, 68, 80 (81) Nov 23–27 Ch 11.1-11.13: Virtual Work Due: 11.8, 16 Thanksgiving Holiday: No Class Thanksgiving Holiday: No Class Nov 30–Dec 04 Ch 11.4-11.5: Conservative Forces Due: 11.24, 32 Quiz 13 Ch 11.6-11.7: Potential Energy Due: 11.36, 44 Study Day: No Class Dec 07–11 Quiz 03 Ch 4.4-4.5: Principle of Moments Due: 4.36, 48, 60 Quiz 04 Ch 5.1-5.2: Free Body Diagrams Due: 4.140, 152, 160 Quiz 05 Ch 5.7: Statical Determinacy Due: 5.60, 68, 76 Quiz 06 Ch 6.3-6.4: Method of Sections Due: 6.28, 36, 48 Quiz 07 Ch 7.1: Internal Loadings Due: 7.4, 12, 24 Quiz 08 Ch 7.4: Cables Due: 7.96, 104, 112 Fall Break: No Class Quiz 09 Ch 8.8: Rolling Resistance Due: 8.108, 116 Quiz 10 Ch 9.4: Distributed Loading Due: 9.52, 64, 80 Quiz 11 Ch 10.1-10.2: Moments of Inertia Due: 10.8, 12, 20 Quiz 12 Ch 10.7-10.8: Mohr’s Circle Due: 10.92, 96, 100 Exam 05: Chapters 10 and 11 8:00AM – 10:00AM Disclaimer Assignments, point distributions, grading scales, and course policies should be regarded as flexible and subject to substitution or change at the discretion of the instructor. Please refer to the 2014-15 Student Handbook for additional university policies. The University of Central Arkansas adheres to the requirements of the Americans with Disabilities Act. If you need an accommodation under this act due to a disability, contact the UCA Office of Disability Services at 501.450.3135. SYLLABUS! PAGE 3/3