Georgia Institute of Technology
Aerospace Engineering 2220: Dynamics
Prof. Eric Feron (July)
Office: 428 Knight; Phone: 404 894-3062
Time and place: The class hours are 9:30 – 10:55 A.M., Tuesdays and Thursdays, and the place is Guggenheim 442.
Text: The book by McGill and King, An Introduction to Dynamics, fourth edition. The notation and methodology of the text will be absolutely not followed so you get a variety of viewpoints, and you are expected to reconcile the course notes with the book. 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. If you do not do so, you will get hopelessly confused and fail the course. We 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 still cannot carry out vector operations such as dot and cross products, consider delaying taking AE2220. Human lives may depend on your correctly carrying out a cross product!
Lectures: The lectures cover theoretical foundations of dynamics. We will follow the syllabus as closely as possible. Because of time constraints we will have to cover the material very quickly. You are expected to wisely use time outside of class to learn the material. This strongly suggests that you be willing to ask questions in class for clarification. If you do not ask questions, we will be forced to conclude that you understand the material, and understand it well. If we are convinced that you have attempted to solve an assigned problem, we will happily answer any questions about it in class.
Homework: About 12 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 getting solutions out of fraternity files, solution manuals, etc., you will not learn how to work the problems on your own! Consequently, you will likely fail the course (as well you should!). 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 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 one of us during our scheduled office hours. If you do come, please have specific questions. Do not simply ask, "How do you work problem 2.32?" We want to know whether you have really tried to solve it or not and what you have tried. Work your 12 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. The assigned homework sets will be weighted as 50 out of 625 points toward your grade (see "Grading" below). If, at the end of the semester, you are on the borderline between two grades, we will increase your homework grade 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 and it must be correct.
Quizzes/exams: there will be four-five 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 project. The quizzes will count towards a total of 300 points, the homework a total of 50 points, and the final will count 275 points for a total of 625 points. Should you miss class on a quiz day, a quiz waiver 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 we are not in. Note: in homework, on quizzes or on the final you may be asked to "show that" certain results are obtained. If we determine that you are trying to deceive us 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.
Grading: Grading will be based on your percentage grade out of 625 points. 45-55% is a D, 55-65% a C, 65-75% a B, and 75% or better an A. Do not expect the course to be easy or the grades to be curved. This course provides a foundation to upper division courses, and we would not be doing you a favor to pass you if you do not know the material.
How to compute your Quiz score: quiz_points = 30*(max(Quiz 1,Quiz1 repeat)+Quiz 2+ max(Quiz 3,Quiz 3 repeat)+Quiz 4)/4 or
quiz_points = 30*(max(Quiz 1,Quiz1 repeat)+Quiz 2+ max(Quiz 3,Quiz 3 repeat)+Quiz 4+ Rigid body rotation)/5
If 8 out of 10 of you fill the survey, then you can drop the quiz corresponding to min (max(Quiz 1,Quiz1 repeat),Quiz 2, max(Quiz 3,Quiz 3 repeat),Quiz 4, Rigid body rotation) and take the corresponding average.
The quiz score sheet is here. Find yourself by looking at the grades that match yours.
Office Hours: Office hours 3:00pm-5:00pm on Mondays and are 11:00am-1:00pm on Wednesdays. You may phone or e-mail and make an appointment if these hours are not suitable for you.
Grader: Reema K Kundu <firstname.lastname@example.org> : 9 -10 a.m. on Mondays and 3.30-4.30pm on Wednesdays in the student lounge on the third floor of Montgomery Knight
· 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