Homework and Reading guide

ME 114, Spring 2006

Homework guidelines: Homework is due at midnight Fri. in the box in the Squid Room. On every homework assignment please do the things listed below. After a few weeks of getting used to these you will have to follow all of them to get any credit on homework.

a) On the top right corner neatly print the following, making appropriate substitutions as appropriate:
    Sally Rogers
     HW 2 Due Feb. 4, 2006
     ME 114
b) STAPLE your homework in the top left corner.
c) Use only the front side of each sheet.
d) You are encouraged to work with others on homework; you will gain more by explaining to and learning from other students. At the top clearly acknowledge all help you got from TAs, faculty, students, or ANY other source (but for lecture, text, and office hours only). 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 a Tau Beta Sigma frat file." etc. If your instructor or grader thinks you are taking too much from other sources he/she will tell you. In the mean time, don't violate academic integrity rules and be unclear about what of your presentation you worked out on your own.
e) Every use of force, moment, momentum, or angular momentum 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 must be dimensionally correct. (Carry your units.)
h) Your work should be laid out neatly enough to read. Part of your job as an engineer is not just to get the right answer, but to communicate its justification clearly. So that is part of your job on the homework as well.
i) Write equations in symbolic form before plugging in numerical values and solving. It makes it easier for you and us to check your work. This is also a much desired practice for your exam solutions.

Homework grading and solutions: We will grade carefully two of the homework problems each week counting for 50% of the total points; the rest will be checked for an honest attempt to complete them and count for the remaining 50%. The carefully graded problems will not be announced in advance. We will penalize late homework and will not accept homework after the solutions are posted. Solutions will be posted at the course web site on the Monday after the homework is due.

Homework assignments:

NOTE:
(1) Homework problems are at end of book.
(2) starred problems have some brief answers at the back of the book.
(3) You DO NOT have to do any part of any problem that asks for a computer solution or a computer plot.

Homework 1, due Fri., Jan. 27:
Topic: Intro., review of vectors for mechanics
Reading guide:

*First two tables inside the cover of the book: without studying them explicitly, you will learn all that's in these tables as the semester progresses. Read through them quickly at the start of the semester and check your progress occasionally as the semester progresses. *Preface: Read and absorb the "guide to student". *Chapter 1 (What is Mechanics?): Read and understand. Review -- *Chapter 2 (Vectors for Mechanics): you need to know all of this vector material well. * Appendix A (Units and Dimensions): you need to know and understand this material well.


Problems: 0) Please read the homework guidelines at the top of this WWW page.  Write "I have read and I understand the homework guidelines." 1) 2.7  2) 2.19,  3) 2.43,  4) 2.50,  5) 2.89,  6) 2.90,  7) 2.91,  8) 2.98,  9) 2.110,  10) Extra Credit, 2.92.
Solutions
Homework 2, due Wed., Feb. 8.
Topic: Equivalent Force Systems and Free Body Diagrams
Reading guide: 2.5 and 3.1.

Problems: 1) 2.112  2) 2.115,  3) 2.119,  4) 2.120,  5) 3.4,  6) 3.5,  7) 3.8,  8) 3.9.
Solutions
Homework 3, due Mon. Feb. 13.
Topic: Center of Mass and Free Body Diagrams
Reading guide: 2.6 and 3.1.
Problems: 1) 2.124,   2) 3.15,  3) 3.23,  4) 4.88 ( Please just draw the FBD of the plate ABCD! Do not solve parts (a)-(f).).
Solutions
Homework 4, due Tues., Feb. 21.
Topic: Topic: Statics equilibrium of one body.
Reading guide: 4.1.
Problems: 1) 4.4,   2) 4.6,  3) 4.9,  4) 4.11, 5) 4.88,  (Now, solve a-f).
Solutions
Homework 5, due Tues., March 14.
Topic: Elementary truss analysis
Reading guide: 4.2.
Problems: 1) 4.24,  2) 4.28,   3) 4.29.
Solutions
Homework 6, Due Tues., Apr. 4.
Topic: Springs and structures/machines
Reading guide: 4.5, 4.6.
Problems: 1) 4.52,   2) 4.57,  3) 4.59,   4) 4.62,  5) 4.70, Note: 'R_2' in the text of the problem should be 'R_0' to correspond to the figure.) 6) 4.72.
Solutions
Homework 7, due Tues., Apr. 25.
Topic: Internal forces
Reading guide: 4.4.
Problems: 1) 4.37,   2) 4.39,  3) 4.46,   4) 4.47,  5) 4.50 .
Solutions
Homework 8, Tues., Apr. 25.
Topic: Hydrostatics
Reading guide: 4.7.
Homework 9, due Fri., .;
Topic:
Reading guide:
Homework 10, due Fri., Apr. 21.
Topic: TBD
Homework 11, due Wed., May 3.
Topic: TBD