**Policy, assignments, and
reading guide
TAM 203, Fall 2008 **

**Homework policy: **To get credit, please do the
things listed below on every homework.

a) Homeworkswill be collected soon after class starts. Homework handed in later will be marked "late." For example, you should have the first homework assignment in hand at your seat at the start of lecture on Tuesday Sept 2.

b)On the top right cornerneatly print the following, making appropriate substitutions as appropriate:

Sally Rogers

HW probs 1-7, Due September 2, 2008

TAM 2030

Section 1 at 12:20

TA: Rong Long

b)STAPLEyour homework at the top left corner.

c)At the top of all work clearlyacknowledge all helpyou got from TAs, faculty, students, or ANY other source (but for lecture, text and section). Examples could be "Mary Jones pointed out to me that I needed to draw the second FBD in problem 2." or "Nadia Chow showed me how to do problem 3 from start to finish." or "I basically copied this solution from the solution of Jane Lewenstein " etc. If your TA thinks you are taking too much from other sources he/she will tell you. In the mean time don't violate academic integrity rules:be clear about which parts of your presentation you did not do on your own.Every use of force, moment, momentum, or angular momentum balance must be associated with a clear correctViolations of this policy are violations of the Cornell Code of Academic Integrity.

d)free body diagram.Your

e)vector notationmust be clear and correct.Every line of every calculation should be

f)dimensionally correct(carry your units, see text Appendix A).Your work should be

g)laid out neatlyenough to read by someone who does not know how to do the problem. Part of your job as an engineer will be toconvincinglyget the right answers. That is your job on the homework as well.

h)Some problems may seem likemake-workbecause you already know how to do them. If so, you can get full credit by writing in full "I can do this problem but don't feel I will gain from writing out the solution". You can keep doing this unless/untill your grader/TA challenges your self-assessment.

i)Computer work should be well commented. At the top the computer text file should include your name which you later highlight or circle with colored pen. At least some part of any computer output should also include your name, printed by the computer. Also highlight this or circle it with colored pen.

j)At least one problem in each assigment should be "solutions quality". This should start on a fresh page, use single sides, and not have a new problem start on the same page. It should be self-contained, including, for example, enough of a problem restatment so that a reader need not see the original problem statement. It should be clear and convincing enough so that another TAM 203 student who has not done the problem and does not know how to do it, can read your solution, understand it, and judge that it is correct. The first word of this solution should be "SOLUTION".

**Study advice: **Try to do assigned homework problems from beginning to
end with no help from book, notes, solutions, people, etc., yourself without
looking up *even one small thing*. Explain, at least outloud to yourself,
every step. If you did need help, then afterwards start the problem over *by
yourself* without looking up even one small thing. Then similarly do other
problems that are like the assigned problems. Then do old prelims and exams.
Finally, for A+ style studying, invent and solve your own problems.

**Homework assignment below ** subject
to change until 3 AM of the morning after which they are listed below

(e.g., August 28 assignment due September 2 is not set in stone until August
29 at 3 AM)

Problems are from RP (Ruina and Pratap) unless otherwise specified or written out.

** Aug 28 Th** Section 9.1: Force and motion in 1D **
**
HW for Aug 28 (due Sep 2 at start of lecture).

1) Read the Policies above and on the linked pages above. Write "I have read and understood the HW and academic integrity policies for this course. The questions I have about them are: ____." Sign your name.

2) Look over text Table of Contents and the front and back tables.

Read Preface and Chapter 1 (pages 10 - 34) and Section 9.1 (396-417).

Write: "I have done _____% of the assigned reading."

3) Write "I can do all the preparatory problems for 9.1 except for ________."

4) 9.15

5) 9.16

6) 9.22

** Sep 02 Tu** 9.1 cont'd: Numerical Solution of ODEs

HW for Sep 2, due Thurs Sept 4

1) 9.26 (numerical solution, analytical solution is optional extra)

** Sep 04 Th ** 9.2, Energy methods in 1D

HW due Tues
Sept 9

0) Don't hand in: Redo 9.26 without looking up anything.

1) 9.30 This is easy, just vocabulary practice.

2) 9.37 The fall distance is the wall height + the leg bending. A simple problem.

3) 9.38 A simple energy problem using some wierd archery words (remember to turn
page).

4) 9.43 This is a bit subtle and takes a bit of thought.

** Sep 09 Tu **9.3 & 9.6: Vibrations: mass, spring
and dashpot; Forcing and resonance **
**HW due Thurs Sep 11

1) 9.49 A basic very simple spring-mass problem.

1) 9.53, because of gravity the concept of "rest position" for a hanging mass has two possible meanings. This problem takes you slowly through the issues associated with defining displacement various ways. The last part takes some thought (of course you should give a justified answer, not a guess).

2) 9.55 Part c requires careful thought because the period of time of contact with the trampoline is not half the period of the associated harmonic oscillator (because of gravity, the feet don't leave the trampoline at the mid-point of the oscillations).

3) 9.109 This practical engineering problem rests on the copy of "frequency response" which was only quickly explained in lecture, so you may need to rely on the text and samples.

4) 9.73 This is a very simple conceptual question, basically asking the difinition of normal mode.

5) 9.76 A slight extension of the lecture example (with a dashpot and forcing)

6) 9.82 A simple problem intended to make you think about motions of multi-DOF systems.

** Sep 16 Tu ** 9.5: Collisions in 1D

HW due Thurs Sep 18

1) 9.84 A simple problem taking you through the concepts and vocabulary of 1D
collisions

** Sep 18 Th **10.1-3: A particle in space, momentum & energy,
celestial mechanics **
**HW due Tues Sep 23

1) 9.92 Tests if you can keep your hat on while calculating a sequence of collisions. And the answer is interesting.

Solutions to most homework through 9.92.

2) 10.22 In spirit this is extremely close to a 3D particle statics problem.

3) 10.26 This problem is genuinely interesting. It has all the look of an intractable non-linear problem but turns out to be a simple linear problem.

4) 10.30 This problem should expand your understanding of parabolic-flight ballistics to the more realistic ballistics of things where air drag is important.

** Sep 23 Tu ** 11.1-2: Coupled particle motion, particle collisions

HW due Thurs Sep 25

1) 10.55, a very simple problem to show if you know what the words mean.

** Sep 25 Th **12.1: 1D constrained motion & pulleys **
**HW due Tues
Sep 30
(may be handed in late with no penalty on Oct 2)

1) 10.61 A computer simulation of a missile trajectory

2) 11.10 A cute simulation of 3 balls in space.

3) 11.20 Very much like lecture example

4) 11.17 Note that 11.17 is not of the standard form, so you can use your program to check your answer, not to generate it

5) 12.6 Just like lecture, easy

6) 12.14b Slightly more involved pulley problem

7) 12.26 Pulley with spring, a bit more involved

** Sep 30 Tu** 12.2: 1D motion with 2D & 3D forces

**Prelim 1, Thr 205 **(Covers
HW through that handed in onThurs Sept 25. Covers lectures through Sept 23.
Covers text chapters 1,2,3,4, 9,10, 11.1) **
**HW due Thurs Oct 2

1) 12.40 Simple constrained object problem

** Oct 02 Th ** 12.2 cont'd

HW due Tues Oct 7

1) 12.43 Il-posed constrained-object problem, why?

2) 12.54 Car braking. Long statement, but basically just a sequene of hints for
a problem that could be stated briefly.

Worth doing carefully and well.

3) 12.72 3D supported plate, good place to practice 3D vectors. Not hard once
you know how.

4) 12.76 3D braked car. You have to know your 3D vectors for such problems.

** Oct 07 Tu ** 13.1: Circular motion kinematics

HW due Thurs Oct 9

1)
13.1 Basically a vocabulary lesson/test

2) 13.15
A simple test of whether you can work with the ideas

** Oct 09 Th **13.2: Dynamics of a particle in circular motion

HW due
Thurs Oct 16

1) 13.36 Everything (or most things) you should know about a simple pendulum

At
this point you can also do the next two problems (below)

** ******Fall break)*****

** Oct 16 Th **13.3: 2D rigid-object rotation

HW due Tues Oct 21

1) 13.45 another circular motion problem, bead on a hoop with friction

2) 13.49
a classic energy/circular motion problem,

3) 13.58 computer graphics, using rotations to draw a rotated drawing.

(Note drawing error: the 30 degree angle to the
x and y axes should be called phi)

** Oct 21 Tu** 13.4: 2D rigid-object angular velocity **
** HW due Thurs Oct 23

1) 13.73 a simple problem. But you have to think to turn the words into sensible equations.

HW due Tues Oct 28.

2) 13.81 very simple gear problem, like lecture example from 10/21

3) 13.83 a more challenging problem, with a math and computer flavor, about angular velocity. Could take an hour or so.

HW due Thurs Oct 30 (not 28).

4) 13.112 quick easy mechanics problem

5) 13.122 easy mechanics problem (almost just kinematics)

HW due Tues Nov 4 (more below)

6) 13.136 multipart pendulum problem. For parts (a,b) answer in terms of sensible
variables (delete the word 'as'). A computer will help with some of the plots.
This problem will take at least a good hour to do well.

** Oct 28 Tu ** 14.1: Rigid-object kinematics **
Prelim 2, Thr 205( **covers
through HW handed in on Oct 28)

HW due Thurs Oct 30

1) 14.1

** Oct 30 Th ** 14.2: Mechanics of a rigid object

HW due Tues Nov 4
(see also problem 13.136 above)

1) 14.12

2) 14.19

3) 14.21

** Nov 04 Tu** 14.3-4**: **Kinematics of rolling
and sliding; contact **
** HW due Thurs Nov 6

1) 14.31

** Nov 06 Th **14.5: Collisions **
**HW due
Tues Nov 11

1) 14.39

2) 14.42

3) 14.56

4) 14.65

** Nov 11 Tu **15.1: Polar coordinates & path coordinates **
** HW due Thurs Nov 13

1) 15.5

** Nov 13 Th** 15.2-3: Rotating frames & their base
vectors; velocity and acceleration**
**HW due Tues
Nov 18

1) 15.6

2) 15.10

3) 15.15

4) 15.18

5) 15.27

** Nov 18 Tu** 15.4: Kinematics of 2D mechanisms**
** HW due Thurs Nov 20.
Solutions through 15.29

1) 15.29

** Nov 20 Th** 16.1: Mechanics of a constrained particle **
**HW due Tues Nov 25

1) 15.32

2) 15.38

3) 16.1 : Typos in prob 16.1. You

are no

4) 16.12

5) 16.21

HW due Tues Dec 2

1) 16.30

2) 16.39

3) 16.41

4) 16.43

5) 16.48

** **Thanksgiving recess (recitations meet Wed until 1:10 PM)

** Dec 02 Tu** 16.3: Multi DOF 2D mechanisms **
**HW due Thur Dec 4

1) 16.55

**Dec 04 Th ** 16.3 cont'd

Do but don't hand in:

1) 16.67

2) 16.69

**Sat Dec 6: ****Makeup prelim** and **Homework
exam**

**Wednesday Dec 17:** **Final Exam**