| Butler Community College | EN260: Statics |
| Math/Behavioral Science | Fall 2008 |
| CRN | Meeting Day(s) | Meeting Time | Site | Building | Room |
|---|---|---|---|---|---|
| 3976 | TR (Spring) | 9:30-10:55am | BOE | 1500 | 203 |
| 12894 | W (Fall) | 8:30-11:30am | BOA | 5000 | 5184N |
Course Syllabus
Statics
INSTRUCTOR INFORMATION
Instructor Name: Larry Friesen
Instructor Contact Information: Office Location: BOE 15246 TRF -- BOA 5000 BLDG
Telephone Number: 733-3138
E-Mail: lfriesen@butlercc.edu.
COURSE INFORMATION
Learning PACT Statement:
The information for this section appears in the student handbook which can be accessed at:
http://www.butlercc.edu/handbook/handbook.pdf
Course Description: EN260 Statics. 3 hours credit. Prerequisites: PH 251 and MA 152 with a C or better. This is a course for pre-engineering students. Topics include: composition and resolution of forces; equilibrium of force systems; application of general laws of statics to engineering problems; analysis of simple structures; machine elements; centers of gravity; and moment of inertia.
Course Relevance: This course is designed for engineering majors. We learn technques for solving problems involving mechanics, including vectors and free bodies.
Required Materials and Supplies: Text: R. C. Hibbeler (2006) Statics (11th Edition) Pearson Prentice Hall; Graphing Calculator or laptop computer
Course Objectives: The information for this section appears in the course outline which can be accessed at http://www.butlercc.edu/outline.
CLASS INFORMATION
Methods of Grading and Evaluation: The student will be evaluated on the basis of his/her/its performance on the following"
Grading Scale |
|
|---|---|
| 90 | A |
| 80 | B |
| 70 | C |
| 60 | D |
| <60 | F |
Methods of instruction include lecture, small group work, and question/answer. Daily homework assignments will be given and graded, and students will be given an opportunity to ask questions about them. Students may sometimes present problems. Computer graphics and overhead transparencies may also be used. This course uses lab projects and Working Model software to provide hands-on experience solving engineering problems.
Section |
Assignment |
Web Link or note |
|---|---|---|
| General Principles 1.1 - 1.5 | ||
| Converting different units of measurement | 10 14 15 | |
| Force Vectors 2.1-2.9 | ||
| Vector operations 2.1-2.3 | 3 13 15 21
|
15; draw a parallellogram with u,v as sides and F as the resultant |
| Addition of components 2.4 | 39 45 50 |
|
Cartesian addition of vectors 2.5-2.6 |
61 67 70 |
61; sum of direction cosines squared is 1 70; F2 is below the xy plane; hypoteneuse of xy triangle is adjacent side of lower triangle |
| Force along a line 2.7-2.8 | 85 87 95 104 |
104; magnitude = 1502N; alpha = 77.6 ° ; beta = 90.6 ° ; gamma = 168 ° |
| Dot product 2.9 | 115 125 126 |
|
| Equilbrium of a particle 3.1-3.4 | ||
| 2D force systems 3.1-3.3 | 7 27 38 |
27; find FAB, FAC, then F = ks 38; use sum Fy for each case, compare |
| 3D force systems 3.4 | 45 55 60 |
55; answers = [A] inverse times [B] |
| Force system resultants 4.1-4.10 | ||
| 2D Moments about a point 4.1-4.4 | 17 19 26 45 46
|
17;All you need is horizontal distance since j X j is 0 |
| Moment about an axis 4.5 | 58 63 |
63; need uca |
| Couples 4.6 | 73 78 95 |
78; the perp distance between the forces is not 1.25 ft; pick a point and find moments 95; add the 2 moment vectors and get the resultant |
| Equivalent systems 4.7-4.9 | 110 117 134 | |
| Reduction of a distributed loading 4.10 | 143 154 158
|
143; sum forces – how high to replace loading? |
Equilibrium of a rigid body 5.1-5.6 |
||
| FB diagrams; equilibrium in 2D 5.1-5.4 | 1 2 3 4 5 6 7 8 9 10 21 34 45 51
|
51; use trig to figure spring length then subtract 200mm to get ΔL |
Free body diagrams; equilibrium in 3D 5.5-5.7 |
68 73 82 |
68; Ez = Dz = 22630 lb; Fz = 13740 lb |
Structural analysis 6.1-6.4; 6.6 |
||
| Trusses by the method of joints 6.1-6.3 | 3 11
|
3; DE is a 2 force member so Ey = 0 |
| Trusses by the method of sections 6.4 | 33 41 47 |
|
| Frames and machines 6.6 | 68 76 101 109 122
|
68; use FB pulley A to begin, P = 5lb, 76; start with FB EC, Ay= 19kN, Ma=26kNm, By=51kN, Cy=26kN. 101; BC is a 2 force member, start with FB ABP 122; Start with theFB arm CD.Sum Md gives CA (2 force body) ; then Pin A, sum forces |
| Center of gravity and centroids 9.1-9.3 | ||
| Centroids 1D,2D,3D using Calculus 9.1-9.2 | 5 8 19 34
|
9-8 answer: 60mm |
| Centroids of composite areas 9.3 | 49 57 63 65 76 |
9-57 You may(0,0) anyplace; their reference is with it at the bottom of the figure. 65; mass = DV, centroid is sum xM over sum of M |
| Moments of inertia 10.1-10.5 | ||
| Moment of inertia for an area 10.9 | 96 103 111 |
Given a formula, use calculus, otherwise table 96 answers: Ix = 32730 , m = 22920 , kx = 1.20 in. 103: Ig = 117.7 slug ft^2, m = 26.34 slug, Io = 282 slug ft^2 111: 3 pieces (subtract the nose cone) 5.64 slug ft^2 |
| Internal forces 7.1-7.3 | ||
|
Internal forces 7.1 |
5 7 10 |
5; figure reactions at A & B first |
| Shear and Moment diagrams 7.2 | 43 50 59 | |
| Relations between shear and bending 7.3 | 68 69 74 | 68 answers: V starts at +3.75, at 2m drops to -3.25; M is triangular with max of 7.5 at 2m, jumps to 13 at 4m and goes down to 0 |
| Friction 8.1-8.2 | ||
| Dry friction 8.1-8.2 | ||
The schedule and procedures in this course are subject to change in the event of extenuating circumstances. (E.g. a tsunami)
The fine print:
INSTITUTIONAL POLICIES
Attendance: : Students are expected to attend all scheduled class and examination meetings. Students are also expected to maintain satisfactory progress in each of the classes in which they are enrolled. Thus, whenever absences become excessive and, in the instructor’s opinion, minimum course objectives cannot be met due to absences, the student may, at the discretion of the instructor, be withdrawn from the course. If a student is withdrawn by the instructor for excessive absences, a grade of “WT” (withdrawn by teacher) will be recorded on his/her permanent record. Instructors are responsible for clearly stating their attendance policy and administrative drop policy in the course syllabus, and it is the student’s responsibility to be aware of those policies.
Procedural Clarifications:
1. Students should not miss class for any reason other than a college activity or an emergency, as determined by the instructor (i.e. , death in the family, health).
2. Student absences for approved college activities will not accrue as excessive absences.
3. Students will be allowed to make up work missed as a result of college approved activities.
4. Students will make up work before the absence for the approved college activity or within one week after returning to class. Students will check with each instructor prior to the absence to arrange for make-up times.
5. Activity sponsors will publish a timely list of students who will be absent because of an approved college activity.
Academic Honesty: Effective learning may involve differences of opinion and views between the student and faculty. Students are responsible, however, for learning the content of course of study outlined by the instructor, regardless of how the student feels privately. This attainment for content must be reached in an honest and forthright manner. Students who compromise the integrity of the academic process are subject to disciplinary action on the part of the college.
Students who have been accused of violating a standard of honesty may protect themselves with a series of appeal processes and are assured of due process and procedure. A student may appeal faculty and administration decisions concerning academic honesty. The first step is with the Division Dean, who, if necessary, may inform the student of further steps in the procedure. These can include appeals to the Vice President for Student Services and College President if the student deems this necessary.
Violations Include:
1. Cheating, in any form, whether in formal examinations or elsewhere.
2. Plagiarism, using the work of others as ones own without assigning proper credit to the source.
3. Misrepresentation of any work done in the classroom or in preparation for a class.
4. Alteration of any documents pertaining to academic records.
5. Disruptive behavior in a course of study or abusiveness toward faculty or fellow students.
Students violating such standards must accept the consequences which may include a failing grade, suspension or dismissal from the class or college.
Incompletes: If a student who has been making a passing grade cannot complete the work in a course due to illness (or other sufficient reason), at the instructor's discretion an "I" (incomplete) may be entered temporarily on the record. A course recorded as an incomplete must be completed within the first six weeks of the following semester (excluding summer) except when an extension of time is granted by the agreement of the appropriate dean and the instructor of the course. If this extension is not granted, the "I" is changed to an "F".
Policies given above are subject to change in the event of extenuating circumstances.
INSTRUCTOR POLICIES
Late/Make up Work: Notify me in advance if you will miss a test. We can then agree on a suitable make-up time. If I am not notified in advance you may make up the test the last week of classes for the semester. The second time you miss a test without advance notification, that test becomes a 0. Once a week, one or more problems will be collected from each homework section. If you do not turn in the homework, it is due by the next class period or it does not count and there is a late penalty. I may grade different problems. You are expected to take the FINAL exam at the College posted date and time.
Class behavior: Any student disrupting class, as determined by the instructor, may be asked to withdraw or take the class independent study.
Special Needs Statement: Anyone needing information concerning special needs should contact your instructor after class or the Special Needs Coordinator, at 322-3321 or 733-3321.
DEPARTMENTAL POLICIES
If a student enrolls in a class without the necessary prerequisite, that student may be dropped at the discretion of the instructor. Students who attend class, do the assignments, and follow instructor policies have the best chance for success in completing the course.
