Spring 2018  UNIVERSITY OF NEVADA, LAS VEGAS

 DEPARTMENT OF MECHANICAL ENGINEERING

 

ME 242           Engineering Mechanics II (Dynamics) MW  MoWe 8:30AM - 9:45AM    Room: WRI C148

Text:               Hibbeler Dynamics 14th edition, Pearson Publ.

 You will be required to submit all homework using Mastering Engineering (http://www.masteringengineering.com/). A license is required and can be purchased from the publisher. Logon to Mastering: The Course Name is  ME242 Dynamics Spring2018   The Course ID is:     MEMAUER14884

Instructor:         Georg F. Mauer    Office: TBE-B 128    Phone 895-3830      E-mail: Georg.Mauer@unlv.edu

Office Hours: MW after class, or by appointment

Prerequisites:    ‘C’ grade or better in CEE 241 (Statics) and in PHY 180-180L

Course web page,  Please bookmark:

http://www.me.unlv.edu/Undergraduate/coursenotes/meg207/meg207.htm

 

Goals:

This course in vector dynamics is designed to teach solution techniques for rigid body kinematics. Conservation of momentum and energy are employed to analyze two and three dimensional problems. The use of vectors and free body diagrams for the analysis of dynamic mechanical systems is stressed.

Analytical Thinking: This course will  train you to analyze and solve problems systematically. This will be a major effort for many of you, so prepare to spend a lot of time on developing the skills every engineer is expected to have.

Course Objectives:

By the end of the course, you should be able to do the following:

·        Create mathematical models of dynamic systems (point mass and rigid bodies)

·        Analyze the kinematics of point mass and rigid body systems.

·        Determine the motion of point mass and rigid body systems in space and time.

·        Use engineering software tools such as Mathcad or Mathematica to solve problems  of point mass and rigid body systems kinematics and dynamics

Why Clickers?
  • Clickers form 20% of your grade
  • Clickers will quiz you on the assigned reading for each class. You will get one point for attendance, plus one point for each correct answer.
  • A good Clicker grade can raise your letter grade by one letter or more, see the examples below.
  • To prepare: study the assigned reading thoroughly the day before class. The assigned reading is always the chapter section for the next homework, posted in Mastering.  Attempt to solve some of the chapter problems. When you encounter difficulties, please note your questions and bring them up in class. Clicker questions will test you both on your knowledge and on your problem solving skills.
The effect of clickers on your final grade: two examples
Test 1 Test 2 Test 3 Final HW Clickers Raw grade    Grade Letter
Average Student, no clicker points 55 50 60 55 67.57 0 46 1.7 C-
Average Student,, some clicker points 65 63 60 55 67.57 50 60 2.7 B-
Average Student, high clicker points 65 63 60 55 67.57 90 69 3.2 B
                 
A-Student, no clicker points 80 85 79 87 90 0 68 3.2 B
A-Student, some clicker points 80 85 79 87 90 50 79 3.9 A
A-Student, high clicker points 80 85 79 87 90 90 88 4.5 A

Homework: See postings in Mastering. Assignments are numbered consecutively. Your first assignment is due Monday Jan. 27 before class.    Submit this and all other Homework on  www.masteringengineering.com.  

Reading Assignments: Please read and seek to understand the material covered in each class. The assigned chapter for each class meeting is listed in the table below. All chapter sections in your textbook contain a set of worked example problems. Try to solve these problems independently, and look to the solution path shown in the book as needed. Seek to understand and master the concepts used in each chapter section, so that you can develop a solution path for each assigned problem. You will be quizzed using clickers on the assigned reading in each class. You will also be asked to answer simple problem solving questions. A credit of 1 point will be given for each correct answer.

Attendance: Attendance will be monitored by clickers. A credit of 1 point will be given for each class session attended.

*   

 

Week

Topic

Chapter Reading Assignments

1

1/17

Kinematics.    Assignment 1: (no credit) Intro to MasteringEngineering     

W     Chapter 12.1- 3              

2

1/22

Kinematics  Normal-Tangential and Polar Coordinates

M    Chapter 12.4-6

W    Chapter 12.7

3

1/29

Relative Motion, Polar Coordinates. skip Chapter 12.3

M     Chapter 12.8              W     Chapter 12.9-10                       

4

2/05

Constrained Motion, Point Mass  Review Thursday Ch 12 and 13

M     Chapter 13.1-4         W     Chapter 13.5                               

5

2/12

EXAM I  Wednesday:  Ch. 12 and 13 Energy

M   Review Chapters 12 & 13 W     Exam I, no reading assignment 

6

2/21

Energy, Rigid Body Kinematics 

 

M   Washington’s Birthday W      Chapter 14.1-4  

7

2/26

Rigid Body Kinematics 

 

M    Chapter 14.5-6            W     Chapter 16.1-4 

8

3/05

Rigid Body Kinematics 

 

M   Chapter 16.5                                W    Chapter 16.6

9

3/12

Rigid Body Kinematics

 

 M    Chapter 16.7                               W   Chapter 16.8

10

3/19

 Rigid Body Kinematics, EXAM II on Wednesday,  Spring Break March 26-31

  M      Review Chapters 14& 16          W   Exam, no reading assignment

11

4/02

Energy

M    Chapter 17.1-3                                W  Chapter 17.4

12

4/09

Rigid Body Dynamics, Energy

Review

 M  Chapter 17.5                                  W    Chapter 18.1-4

13

4/16

 Exam III  Monday

Impulse

M   Chapter 18.5                                  W  Review Chapters 17&18

14

4/23

Impulse

M  Exam 3, no reading assignment                                W  Chapter 15.1-3

15

4/30

Impulse           

M  Chapter    15.4                   W  Final exam review

The web schedule and homework assignments will be updated as needed. Please check the Mastering site regularly!

T

At http://me.unlv.edu/Undergraduate/coursenotes.html you’ll find a copy of this schedule. Select ME 242 Course Information and  ME 242 Dynamics Syllabus. This schedule and homework assignments will be updated weekly on the Mastering Engineering site only, visit http://www.masteringengineering.com/

FINAL EXAM:  Wed.  May 9,  8  a.m. – 10 a.m.

 

Policies: Homework is due twice weekly BEFORE class on the dates shown in the schedule on Mastering. All homework must be submitted on the Mastering Engineering Web site. Late homework is NOT accepted.  All tests are closed book and closed notes. Make‑up tests will NOT be given. Excep­tions are made only if student provides valid reason for absence PRIOR to the test date.  All students are expected to attend class regular­ly. Only students who have completed the prerequisite courses are eligible for participation in this course; ineligible students will be dropped. Students requiring accommodations with regard to religious holidays must request these from the instructor in writing no later than Friday of the first week of instruction.

I-Clickers: Every student will be required to bring an individually coded I-clicker to every class meeting. Purchase an I-clicker at the UNLV bookstore, or borrow one from the ME department. Loaned clickers must be returned to the department before the final exam at the end of the semester.  Students who would receive a passing grade, but who have not returned their loan I-clickers, will receive a semester grade of Incomplete.  No I-clicker make-up questions will be given.

Grading:

Homework

:  10

 

Class Participation   (Attendance and I-clicker scores)

:  20

  Tests :  40

 

Final Exam

:  30

 

 

100%

 All ME students must meet with their faculty mentor at least once in each semester to avoid any hold on their registration. Please contact the department for the name of your faculty mentor if you have not already been assigned one. When your faculty mentor is not available, please contact the ME Department for any advice at 895-1331.
 

UNLV Policies

Academic Misconduct Academic integrity is a legitimate concern for every member of the campus community; all share in upholding the fundamental values of honesty, trust, respect, fairness, responsibility and professionalism. By choosing to join the UNLV community, students accept the expectations of the Academic Misconduct Policy and are encouraged when faced with choices to always take the ethical path. Students enrolling in UNLV assume the obligation to conduct themselves in a manner compatible with UNLV’s function as an educational institution.

An example of academic misconduct is plagiarism. Plagiarism is using the words or ideas of another, from the Internet or any source, without proper citation of the sources. See the Student Academic Misconduct Policy (approved December 9, 2005) located at: http://studentconduct.unlv.edu/misconduct/policy.html.

 

Copyright – The University requires all members of the University Community to familiarize themselves and to follow copyright and fair use requirements. You are individually and solely responsible for violations of copyright and fair use laws. The university will neither protect nor defend you nor assume any responsibility for employee or student violations of fair use laws. Violations of copyright laws could subject you

to federal and state civil penalties and criminal liability, as well as disciplinary action under University policies. Additional information can be found at: http://provost.unlv.edu/copyright/statements.html

Disability Resource Center (DRC) The Disability Resource Center (DRC) determines accommodations that are “reasonable” in promoting the equal access of a student reporting a disability to the general UNLV learning experience.   In so doing, the DRC also balances instructor and departmental interests in maintaining curricular standards so as to best achieve a fair evaluation standard amongst students being assisted.  In order for the DRC to be effective it must be considered in the dialog between the faculty and the student who is requesting accommodations.  For this reason faculty should only provide students course adjustment after having received an “Academic Accommodation Plan.”  If faculty members have any questions regarding the DRC, they should call a DRC counselor.

UNLV complies with the provisions set forth in Section 504 of the Rehabilitation Act of 1973 and the Americans with Disabilities Act of 1990.  The DRC is located in the Student Services Complex (SSC-A), Room 143, phone (702) 895-0866, fax (702) 895-0651. For additional information, please visit: http://drc.unlv.edu/.

 

Religious Holidays Policy Any student missing class quizzes, examinations, or any other class or lab work because of observance of religious holidays shall be given an opportunity during that semester to make up missed work. The make-up will apply to the religious holiday absence only. It shall be the responsibility of the student to notify the instructor no later than the end of the first  week of classes, of his or her intention to participate in religious holidays which do not fall on state holidays or periods of class recess. This policy shall not apply in the event that administering the test or examination at an alternate time would impose an undue hardship on the instructor or the university that could not reasonably been avoided. For additional information, please visit: http://catalog.unlv.edu/content.php?catoid=4&navoid=164.

  

Tutoring The Academic Success Center (ASC) provides tutoring and academic assistance for all UNLV students taking UNLV courses.  Students are encouraged to stop by the ASC to learn more about subjects offered, tutoring times and other academic resources.  The ASC is located across from the Student Services Complex (SSC). Students may learn more about tutoring services by calling (702) 895-3177 or visiting the tutoring web site at: http://academicsuccess.unlv.edu/tutoring/.

 

UNLV Writing Center One-on-one or small group assistance with writing is available free of charge to UNLV students at the Writing Center, located in CDC-3-301. Although walk-in consultations are sometimes available, students with appointments will receive priority assistance. Appointments may be made in person or by calling 895-3908. The student’s Rebel ID Card, a copy of the assignment (if possible), and two copies of any writing to be reviewed are requested for the consultation. More information can be found at: http://writingcenter.unlv.edu/

 

Rebelmail By policy, faculty and staff should e-mail students’ Rebelmail accounts only. Rebelmail is UNLV’s official e-mail system for students. It is one of the primary ways students receive official university communication such as information about deadlines, major campus events, and announcements. All UNLV students receive a Rebelmail account after they have been admitted to the university. Students’ e-mail prefixes are listed on class rosters. The suffix is always @unlv.nevada.edu.

 

Final Examinations – The University requires that final exams given at the end of a course occur at the time and on the day specified in the final exam schedule.  See the schedule at: http://www.unlv.edu/registrar/calendars