PHYS 332   Engineering Mechanics--Dynamics        SPRING 1997

 

Textbook:                Engineering Mechanics -- Dynamics (2nd ed.)

  by W. F. Riley and L. D. Sturges ( John Wiley  1996)

 

Instructor:                Dr. Mesgun Sebhatu.  Office: Sims 203.  Office Hours:  MWF 10:00--10:50AM.

                                Available at other times by appointment.

                                Phone: 323-2113x235,  e-mail: sebhatum@winthrop.edu

 

Prerequisite:        Statics (PHYS 331).  Recommended Software: Dynamics Software for Students.

 

Brief Description of the Course: Engineering mechanics consists of statics (PHYS 331) and dynamics (PHYS 332). Statics is the study of the effect of forces on systems of particles and rigid bodies in equilibrium. Dynamics deals with the fundamental principles of kinematics and kinetics of particles and rigid bodies. Kinematics is a mathematical description of motion while kinetics is the study of the relationship of motion and the forces that cause it. Vector analysis and calculus are used extensively in engineering mechanics. The major objective of engineering mechanics is to help the student understand basic mechanics principles and apply them in the solutions of a variety of problems.  Solving problems plays a highly significant role in the understanding and application of dynamics concepts and principles. A student should make a serious effort to solve all the assigned problems and ask questions about them in and outside class.  It also helps to work  with classmates and use the recommended tutorial software.

 

          Tentative Course Outline and Test Schedule

 

I.                Introduction:

                General Principles (Ch. 12); Kinematics of Particles (Ch. 13);

and Kinematics of Rigid Bodies (Ch. 14)

                Test #1: Ch.  12, 13, and 14           Friday,  February 7

 

II.                Newton's Laws of Motion:

Newton's Laws of Motion and their Application in Kinetics of Particles (Ch. 15)

and Kinetics of Rigid Bodies (Ch. 16)

                Test #2:  Ch. 15 and 16                 Friday,  March 7

 

III.           Work and Energy:

Work and Energy Methods and their Application in Kinetics of Particles(Ch. 17)

and Kinetics of Rigid Bodies( Ch. 18).                                         

Test #3: Ch. 17 and 18                  Friday, April 4

 

IV.           Impulse and Momentum:

                Impulse and Momentum Principles and their Application in

the Kinetics of Particles (Ch. 19) and Kinetics of Rigid Bodies (Ch. 20)

                   Mechanical Vibrations: Undamped, Damped and Forced Vibrations (Ch. 21)

 

Test #4: Ch. 19,20  and 21                       Friday, April 25

 

A comprehensive Final Exam on Parts I to V.                See Final Exam Schedule

 

Computation of Final Grade:

 

The final grade will be based on:

 

The total  homework Grade :                                               10%

The average of the best three  test grades :          60%

The comprehensive final exam grade:                                  30% 

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Total G %                                                                                             100%

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Assignment of the letter grades depends on the numerical grade distribution.

Usually letter grades are assigned as follows:

 

G% > 90                                                                                                "A"

 80    89                                                                                                 "B"

70    79                                                                                                  "C"

60     69                                                                                                 "D"

G%< 60                                                                                                 "F"

 

Make Up Tests: A student who misses a test will obtain a "0" for it and will lose the opportunity to have the lowest test grade dropped. The missed test becomes the lowest grade.  As soon as a student contemplates  missing a test, it is preferred that the student make his reasons clear to the instructor so arrange­ments for taking a test, preferably early, can be made. It will be highly risky to miss more than one test.

 

Class Attendance Policy: The attendance policy followed in this course is the same as that which appears in the 1996‑97 Winthrop University Catalog.  Briefly, "If a student's absences in a course total 25% or more of the class meetings for the course, the student will receive a grade of N, F, or U, which ever is appropriate." Please read your catalog for details.

 

Students who leave early or come excessively late will be marked absent despite the appearance of their signature on the class roll. If an emergency forces a student to be late or to get up and leave, it is polite and proper to let the instructor know. Students will be encouraged to ask questions and participate in class discussions. However, carrying lengthy conversation, reading  or writing materials external to the course during the class period is intolerable and considered disruptive. Such students will get some warning and if they persist, they will be marked absent.

 

  

 

 

PHYS 332            COURSE SCHEDULE            SPRING 1977

 

Date     Topics            Sections

            General Principles (Ch. 12)

1/15            Introduction to Dynamics, Newton's Laws, Fundamental  Quantities                     12.1-12.3

1/17      Units of  Measuremnet, Dimensions, Methods of Problem Solving            12.4-12.5

1/17            Significance of Numerical Results 12.6

            Kinematics of Particles(Ch. 13)      

1/21            Rectilenear Motion            13.1-13.3

1/21      Relative Motion in  a strait Line            13.4

            Homework1A:  13.1-13.4  13.7-13.10   13.12  13.13-13.16  13.26  13.37   13.47 

                                     13.51  13.56  13.63  13.73  13.80

1/23      Plane Curvilinear Motion              13.5

1/23      Relative motion in a Plane and in Space   13.6-13.7

            Homework1B: 13.87  13.94 13.94  13.99   13.103   13.116   13.126  13.137   13.147

                                    13.159    13.162  13.168 13.172  13.180  13.185

              Kinematics of Rigid Particles (Ch. 14)

1/25            Introduction, Translation, Planar Motion               14.1-14.3

1/28            Rotation About a Fixed Axis     14.4

            Homework1C: 14.2  14.6  14.13   14.20  14.27   14.39 

1/31      General Plane Motion            14.5

2/3        Motion Relative to Rotating Axes            14.6

2/5        Three-Dimnsional Motion of a Rigid Body                                                                                14.7

               Homework1D:   14.44  14.47 14.49  14.59  14.60   c14-67  14. 72  14.75   14.67  14.89                              14.91  14.95  14.111  14.112   14. 118    14.121  14.128  14.140  14.142

                                    14.146  14.154

 

2/7            Homework 1 due before test #1 starsts

2/7       Test #1 on Chapters 12, 13 and 14

2/9            Discussion of test #1

 

             Kinematics of Particles: Newton's Laws  (Ch. 15)

2/11            Introduction, Equations of Motion, Rectilinear Motion  13.1-13.3

            Homework2A:    15.2  15.8  15.11  15.15  15.21 15.29  15.33  15.39 15.43

                                   

2/13              Curvilinear Motion, Central Force Mption  15.4-15.5

            Homework2B   15.79  15.82  15.85  15.93  15.96  15.102  15.103 15.111 15.121

           

            Kinematic of  Rigid of Bodies: Newton's Laws (Ch. 16)

2/15             Introduction, Equations for Plane Motion, Moment and Products of Inertia   16.1-16.3

2/18            Translation, Rotation, and General Plane Motion of Rigid Bodies            16.4

2/21      Three-Dimensional Motion of A Rigid Body,             16.5

2/23            d'Alem\bert's Principle-Reversed effective Forces            16.6

              Homework2C: 16.1  16.7   16.15   16.25   16.27  16.31  16.36   16.42  16.46  16.51 16.55                                                      16.62   16.73  16.75  16.85   16.92  16.111 16.115

 

2/25            Homework2 due before Test #2 starts:

2/25     Test #2 on Chapters 15 and 16

2/28            Discussion of Test #2

 

 

            Kinematics of Particles: Work and Energy Methods (Ch.17)

  3/2            Introduction; Force, Distance, and Velocity; Kinetic Energy;  Work    17.1-17.4

            Homewok3A:   17.2  17.4  17.8  17.8  17.16  17.18

3/5            Principle of Work and Kinetic Energy                                      17.5-17.6

            Homework3B:  17.21  17.25  17.34  17.42  17.45  17.56 17.51 17.59  17.63

3/8            Conservative Forces and Potential Energy,   General Principles of Work and Energy  17.7-17.8

            Homework3C:  17.69 17.73 17.76  17.82  17.88  17.91 17.94  17.107  17.110

 

3/10 - 3/15             ****SPRING BREAK*******

 

Kinematics of Rigid Bodies: Work and Energy Methods (Ch. 18)

3/18             Introduction, Work of Forces and Couples Acting on Rigid Bodies, Kinetic Energy of Rigid             bodies in plane motion.            18.1-18.3

3/20            Principle of Work and Energy for the Plane Motion of Rigid Bodies, Power  18.4-18.5

            Homework3d:   18.1  18.3  18.9  18.11  18.14  18.17  18.21 18.36  18.48

                                    18.58  18.66  18.71  18.77 18.88

3/22