Policy, assignments, and reading guide
TAM 2020, Summer 2011

Homework policy: To get credit, please do these things on each homework.

a) Hand in to TA at start of recitation.

b) On the first page of your homework, please put the following to ease sorting:

	On the top left corner please leave blank		On the top right corner neatly print your name, course, date, e.g.:
			Sally Golnaraghi TAM 2020  HW 1, Due June 28, 2011

 

 

 

 

c) At home, please put a Staple at the top left corner. Folded interlocked corners fall apart. Paperclips fall off.

d) Cite your help. At the top of each problem clearly acknowledge all help you got from TAs, faculty, students, or any other source (with exceptions for lecture, text and section, which need not be cited). You could write, for example: "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 copied this solution word for word from Jane Lewenstein " or "I found a problem just like this one, number 386.5.6, at cheatonyourhomework.com, and copied it." etc. You will not lose credit for getting and citing such help. Don't violate academic integrity rules: be clear about which parts of your presentation you did not do on your own. Violations of this policy are violations of the Cornell Code of Academic Integrity.

e) Every use of force or moment balance must be associated with a clear correct free body diagram.

f) Your vector notation must be clear and correct.

g) Every line of every calculation should be dimensionally correct (carry your units, read Appendix A of online book).

h) Your work should be laid out neatly enough to be read by someone who does not know how to do the problem. Part of your job as an engineer will be to convincingly get the right answers. Your job on the homework is to practice this.

i) Some problems may seem like make-work because 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" or, in short, "Can do, don't want to." You can keep doing this unless/untill your grader/TA challenges your self-assessment.

j) Computer work should be well commented (sample). Your name should be near the top of the computer text file. Before handing in, you should highlight (or circle with a colored pen) your name on the computer printout. At least some part of any other computer output should also include your name, printed by the computer. Highlight (or circle) your name on each page.

k) At least one problem in each week 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 2020 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". Your solution may be selected for posting (without your name). If you do not want your solution posted, please say so on the top of each homework.

l) Grading and regrading. We have a reasonable homework grading and re-grading policy.

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.

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

Lecture dates:

Mon June 27: 2011, Quiz on VideoNote lecture from Aug 25, 2010.
   Read by Monday June 27: RP pages 14-37
   Review by Monday June 27: RP 2.1 (Vector notation and addition). Master Sample 2.1.
   Problems: 2.1.6, 7, 20, 23, 39 (Five problems from section 2.1)
      (If the numbers of your problems don't look like this, you have the wrong book.)

June 28: Video from Frid Aug 27, HW1 Solution
  RP 2.2 (dot product), 2.3 (cross product), 2.4 (moment)
  Problems:    2.2.11, 20,        2.3.2, 14,         2.4.13 (Five problems total)

June 28: Video from Mon Aug 30, Matlab code from lecture.
  RP 2.5 (Solving vector equations)
  Practice (but don't hand in) 2.5.1e, 2d, 3c, 4, 5
  Problems:               Hand in 2.5.9 (that's one problem, #9 in section 2.5)

June 29: Video from Wed Sep 1
  RP 2.6 (Equivalent forces)
  Problems: 2.6.8 (all pts of application make angles of 45 degrees relative to standard axes),
         optional challenge: 2.6.16

June 29: Video from Fri Sep 3, Matlab code,              HW2Solution
  Read by Sept 8 Section RP 3.1 & 3.2 (Free Body Diagrams)
        To supplement readings in RP3.1-2 watch VideoNote ENGRD 2020 Fall 2009, Sept 23.
              (Skip to 2:15. Furthest right distance on bottom of blackboard figure should be d/2.)
   This lecture: 2.7, 4.1, 4.2(Center of mass, Equilibrium of a particle and rigid object)
                    2.7.11 (the cutout circle is bigger than the picture indicates, its diameter is almost the radius of the
                                 circular plate ),  4.1.23,    4.2.14, 22,     

June 30: Video from Wed Sep 8
  RP 4.3 (statics with friction)
  Practice 4.4.1 - 9
  Problems:      4.3.10, 15, 20

June 30: Video from Fri Sep 10, Marked up student solutions to HW 3 here.
  Statics w/ friction (cont'd)
    Blocks, logs and wheels

July 1: Lab 1, read manual and do prelab questions before the lab.

 July 5: Video from Mon Sep 13
   4.4 (Internal forces)
   RP 4.5 (3D statics of objects)
   Practice 4.5.1 - 4 (that means 4.5.1 and 4.5.2 and 4.5.3 and 4.5.4)
   Problems:   4.4.10, 4.5.10 (text error: change   IE    to    CE   and change    I,C and B     to     C and B),
                   4.5.13, 4.5.17

July 5: Video from Wed Sep 15
 RP 5.1 (Truss, method of joints)
  Practice 5.1.1-12
  Problems 5.1.13, 21

July 6: Video from Fri Sep 17
 RP 5.2 (Truss, method of sections)
  Practice 5.2.1-6
  Problems 5.2.7 (change the base length AF to 3L, 2L is wrong), 5.2.14,

July 6: Video from Mon Sep 20       Matlab code.
  No posted solutions for this week HW, but they are like 5.5.10 below.
  RP 5.3 (Trusses, computer solution intro)
  RP 5.5 (Advanced truss concepts, if you have not taken 2940 skip things you don't understand)
  Problems: 5.3.1, 2, 3

July 7: Video from Wed Sep 22
  RP 5.3 (Trusses, computer solution)
  Problems: 5.3.7 (can you do this without a computer?)

July 7: Video from Fri Sep 24 (All of this week's HW due Sat Oct 2 at 10PM)
   RP 5.3 (Trusses, computer solution)
   Problems 5.3.11 a, d (do by hand and compare with the computer solution)
All problems from section 5.3 should be done by computer. At a minimum this would mean using the supplied program and/or writing ad hoc commands for doing the homework. At a maximum this would mean writing your own general truss solver using the algorithm in the book or one of your own design. In between would be modifying the supplied program in ways you find interesting. You can compare your solution with one by the supplied program. You can also see which of the trusses you can solve by hand or what the difficulties are of a hand solution that are overcome by the computer. You can further play with geometry and loads and try to tease out interesting features of trusses or of truss solution algorithms. In all cases you should follow the various guidelines for homework given at the top of this page (documented printouts, clear work, etc).

July 8: Video from  Mon Sep 27
  RP 5.4 (Frames and structures)
  Practice: 5.4.1-4
  Problems: 5.4.5, 9, 10 ,       5.5.10a,d

July 11: Video from Wed Sep 29
 RP 6.1 (Mechanisms: springs)
 Practice 6.1.1 - 6
 Problems: 6.1.7, 11, 16, 17

July 11: Video from Fri Oct 1
  RP 6.2 (Force amplification: pulleys, wedges, levers)
  Problems: 6.2.6, 17, 22

July 12: Video from  Mon Oct 4
 RP 6.3 (Mechanisms)
  Problems 6.3.2, 6

July 12: Video from Wed Oct 6
  More on 5.4, 6.1-3 (Frames and mechanisms)
  6.3.14 (a more clear version of the figure for 6.3.14 is here)
  6.3.15, 16

July 13: Video from Fri Oct 8: This HW (MWF) due Friday Oct 15 at 10 PM. A two day extension.
  More on 5.4, 6.1-3 (Frames and mechanisms)
  6.2.25,    6.3.11

 July 13: Video from Wed Oct 13
  RP 8.1 (Hydrostatics)
  8.1.3, 4, 6 [(a) answer depends on mu, (b) use mu = 0.5], 8

July 14: Video from Fri Oct 15
  BJ 8.1-4 (Shear and normal stress)
  Problems: 8.5b, 11, 12b,

July 15: Prelim 1, covers through HW handed in on July 13.

July 18: Video from Mon Oct 18
  BJ 8.6-7 (Stress in structures, design)
  Problems: 8.13, 16

July 18: Video from Wed Oct 20     Guest lecturer: Professor Wolfgang Sachse.
  BJ 8.8-10 (Stress on crooked planes, general loading, design)
  Problems: 8.25, 29, 31, 8.50a, 8.55a

July 19: Video from Fri Oct 22    Guest lecturer: Professor Herbert C.Y. Hui.
  BJ 9.1-5 (Axial stress and strain, material properties), see also RP 7.1
  Problems: 9.1, 9.3, 16,

July 19: Video from  Mon Oct 25
 BJ 9.7 (Deformation)
  BJ 9.8-9 (Thermal stresses, statically indeterminate problems)
  Problems: 9.25, 30, 34

July 20: Video from Wed Oct 27
  BJ 9.12 (Shear strain, E, G, nu) , scan BJ 9.14
  Problems: 44a, 77, 9.55

July 20: Video from Fri Oct 29
  BJ 10.1-4 (Torsion of elastic round bars)
  Problems: 10.1, 3, 11c, 51

July 21: Video from Mon Nov 1
  BJ 10.5 (Angle of twist)
  Problems: 10.32, 33

July 22: Lab 2, read manual and do questions before lab

July 25: Video from Wed Nov 3
  BJ 10.6 (Twisting of Indeterminate round shafts)
  Problems: 10.45, 59

   ---Thurs Nov 4: Prelim 2, inclusive through lecture of Oct 22---

July 25: Video from Fri Nov 5
  BJ 11.1-3 (Pure bending)
  Problems: 11.1, 2, 17, 24a
  BJ 11.4 (Stress and deformation in bending)
  Problems: 11.23, 97

July 26: Video from Mon Nov 8
  BJ 11.5 (Bending of composites, rebar)
  Problems: 11.25, 11.45

July 26: Video from Wed Nov 10
 RP 7.1, BJ 12.1-2 (Shear and Bending Moment diagrams)
 Practice: RP 7.1.1-3
 Problems: RP 7.1.4 (easy), 7.1.17 (harder)  
                 BJ 12.1, 2, 7, 26

July 27: Video from Fri Nov 12
  BJ 12.3-4 (dM/dx, dV/dx, design of beams)
  Problems: 12.29, 35, 47

July 27: Video from Mon Nov 15
  BJ 13.1-3 (Shear in Beams)
  Problems: 12.61, 13.13, 17, 19

July 28: Video from Wed Nov 17
  BJ 13.4 (Shear in common beams)
  Problems: 12.17, 19

July 29; Prelim 2, covers through HW handed in July 27, inclusive of earlier material

Aug 1: Video from Fri Nov 19 (This week's HW due due Mon Nov 29, 10 PM)
  BJ 15.1-3 (Deflection of Beams)
  Problems: 15.1, 2, 4,

Aug 1: Video from Mon Nov 22
  BJ 15.1-3 (Deflection of Beams)
  Problems: 15.12, 18

Aug 2: Lab 3, read manual and do pre-lab before the lab

Aug 3: Video from Wed Nov 24
  BJ 15.5 (Indeterminate beams)
  Problems: 15.27

Aug 3: Video from Mon Nov 29
  BJ 15.6 Superposition for beams
  Problems: 15.34

Aug 4: Video from Wed Dec 1
  BJ 15.7 Superposition and indeterminate beams
  Problems: 15.47, 15.59, 15.62

Aug 5: Video from Frid Dec 3
  Review

Aug 6: Homework exam (9 AM - 1 PM)

Aug 8: Final Exam, 1:30 - 4:00, Comprehensive. 5 questions.