**Georgia Institute of Technology**

**School of Aerospace Engineering**

**Dynamics – AE 2220-A**

**MWF 8:05-8:55 a.m., Guggenheim 442**

**Prof. Dewey H. Hodges**

**Office: 200-C SSTC/Weber**

**Phone: 4-8201**

**E-mail: dhodges@gatech.edu
**

**Time and place:** The class hours are 8:05-8:55
a.m., Mondays, Wednesdays, and Fridays, and the place is Guggenheim 442.

**Office Hours:** My office hours for this class
are Tuesdays, 1:00-2:30 p.m., and Fridays, 9:15-10:45. You may phone or e-mail
me and make an appointment if these hours are not suitable for you. You
may also see the teaching assistant who will also be conducting help sessions
when needed (at most weekly). The TA and his office hours are to be announced. His
hours will be chosen distinct from mine to give you maximum opportunity to see
us when you need to. Help sessions up to one per week
will be on a weekday evening, also in Guggenheim 442.

**Text:** The text is the outstanding
book by McGill and King, *An Introduction
to Dynamics,* fourth edition. The notation and methodology of the text will
be followed strictly, and you are expected to do the same. You are also
expected to read the assignments listed in the syllabus and to come to class
with questions on this material. Any material in the reading assignments will
be considered as fair game for the quizzes and final exam even, if this
material is not covered in the lectures. The text carefully distinguishes
between vectors and scalars, and rightfully so. If you do not do so as well,
you will get hopelessly confused and fail the course. I will accelerate that
process by docking points from the quiz grades of anyone who fails to make the
appropriate distinctions, and the amount deducted will increase with each test.
If you passed Statics, but you still cannot carry out basic vector operations
such as dot and cross products, you will most definitely fail this course (as
well you should!) unless you get your act together. Human lives may depend on your correctly carrying
out a cross product!

**Lectures:** The lectures cover theoretical
foundations of dynamics. The syllabus will be followed as closely as possible.
Because of time constraints I will have to cover some material very quickly.
You are expected to wisely use time outside of class and be prepared to spend
three hours outside class for every hour you spend in class in order to learn
this material. This strongly suggests that you be willing to ask questions in
class for clarification. If you do not ask questions, I will be forced to
conclude that you understand the material, and understand it well. If I am
convinced that the class as a whole has attempted to solve an assigned problem,
I will happily answer questions about it in class. If I am convinced that you
as an individual have attempted to solve an assigned problem, I will happily
answer questions about outside class.

**Homework:** About nine problems per week
are assigned (on average). If you can work the homework problems on your own,
it is very likely that you will also be able to work problems on the quizzes
and on the final exam. If you choose the dishonest route of copying solutions
from fraternity files, solution manuals, etc., you're violating the honor code. Consequently, you will not learn how to work
the problems on your own, and you will likely fail the course (as well you
should!). See this article: http://www.sciencenews.org/view/generic/id/57656/title/Homework_makes_the_grade! You can watch someone else
solve dynamics problems until doomsday and never learn anything. You will learn
best by thinking them through on your own. Working on homework in groups of
more than two is not permitted. However, working in pairs is acceptable as long
as you really interact and both of you really contribute. If you play the role
of a "sponge" you will learn next to nothing. You should attempt to
solve the assigned problems and as many related problems for which you have
time. If you have difficulty doing the problems, please raise a question in
class. Alternatively, you may see the TA or me during our scheduled office
hours. If you do come, please have specific questions. Do not simply ask,
"How do you work problem 2.32?" I want to know whether or not you
have really tried to solve it and what you have tried. Work your nine problems
per week, and you should be able to do the quizzes and final without
last-minute panic. Problems will be collected according to the schedule in the
detailed syllabus. Late homework is not
accepted. On the attached syllabus, each quiz has in parentheses by it the
article numbers covered on the quiz. Make certain that you have solved the
assigned problems associated with those articles before the last class prior to
each quiz so you can ask questions in class about the problems. The assigned
homework sets will be weighted as 50 out of 675 points toward your grade (see
"Grading" below). If, at the end of the semester, you are on the
borderline between two grades, your homework grade will be increased to the
full 50 points if you turn in a complete and correct set of homework at the
final exam. No partial credit will be given: It must be ** complete**,

**Quizzes/exams:** there will be at least seven
quizzes, of about 30 minutes duration each, and a comprehensive final
examination. You will be permitted to overwrite one quiz grade with the grade
from a computer project. The quizzes will count 50 points each (total=350), the
homework a *total *of 50 points, and
the final will count 275 points for a total of 675 points. Should you miss
class on a quiz day, a makeup quiz will only be given if you have a doctor's
note stating that you are too sick to attend class or if you have a death in
your immediate family. In the latter case, if possible, you must notify me
before the quiz. You must either send me e-mail or you must phone our office,
leaving a voice-mail message if I am not in. Note: in homework, on quizzes or
on the final you may be asked to "show that" certain results are
obtained. If it is determined that you are trying to deceive me into thinking
that you have correctly obtained the result when in fact you really have not,
you will get zero credit for that problem. If this happens more than once, you
will receive a zero on all tests on which you are caught after the first time.
On the attached syllabus, each quiz has in parentheses by it the article
numbers covered on the quiz. Make certain that you have solved the assigned problems
associated with those articles before the last class prior to each quiz so you
can ask questions in class about the problems.

Projects must be turned in no
later than the last day of dead week. A grade of *C* on the project means a substandard project that fails to meet the
stated requirements in some substantial way; a *B* would mean a good project that meets most of the stated
requirements; and an *A* would mean a
project that meets all the stated requirements perfectly. A grade of 50/50
would mean that your project substantially exceeds the stated requirements. You
may validate your code by comparing results with those of others, but *you must do all your work independently*.
If there is evidence of unauthorized collusion, this will be treated as a potential
**honor code** violation and reported to
the Dean of Students.

**Grading:** Grading will be based on your
percentage grade out of 675 points. 60-70% is a D, 70-80% a C, 80-90% a B, and
90% or better an A. Do not expect the course to be easy or the grades to be
"curved" as others may do. I do not make use of the class average in
determining your grade. This course provides a foundation to upper division
courses, and I would not be doing you a favor to pass you if you do not know
the material.

·
To
be able to derive equations for the kinematics and kinetics of particles in
three-dimensional motion

·
To
be able to derive and use equations for the kinematics of rigid bodies in
two-dimensional motion

·
To
be able to set up and solve equations of motion for rigid bodies in
two-dimensional motion

·
To
be able to apply work-energy principles in the solution of rigid-body dynamics
problems in two dimensions

·
To
be able to derive and use equations for kinematics of rigid bodies in
three-dimensional motion

·
To
be able to set up equations of motion for rigid bodies in three-dimensional
motion

*Project*

Updated
1/7/2013