As we talked about in class today and on Wednesday, here’s some last-minute advice on the exam. First, we will have at least 4 regular problems (like on the previous exams) and at least 2 “short” problems. Short problems are things like: here’s a truss…how many zero force members are there? Second, to prepare, do lots of problems, and work in study groups if you are comfortable doing that. You can always go to the library to get other statics books and see many more problems. Third, I should be available on Monday before the exam for any last-minute questions. Fourth, the exam will certainly emphasize the latter part of the course; you can reasonably expect problems on V&M, centroid, machines/frames, maybe something like Problem 1 on Exam 2.
Any other questions? Post them here…
28 responses so far ↓
1 Fox // Dec 7, 2007 at 3:10 pm
Will the centroid problem consist of find the moment of inertia?
2 Laura Ostanek // Dec 7, 2007 at 3:23 pm
Is there a note sheet allowed?
3 twb4t // Dec 7, 2007 at 9:07 pm
I’m pretty sure he said we wont have to find the moment of inertia on the exam.
4 DanielJ // Dec 7, 2007 at 11:32 pm
I don’t think anyone has specifically addressed this yet, would flat belt frictional forces be something we should spend a lot of time studying?
5 John // Dec 8, 2007 at 1:18 am
a 2 page front and back equation sheet is what i think he said would be allowed.
6 Blue // Dec 8, 2007 at 2:08 pm
Along the lines of friction problems, I know it’s already been mentioned no screws or wedges.
What about journal bearings, collar bearings, pivot bearings, disks, or rolling resistance? I don’t recall those being covered, but….
7 twb4t // Dec 8, 2007 at 3:15 pm
Will the problems be taken from the book or from somewhere else?
8 Fox // Dec 8, 2007 at 4:30 pm
The problems will most likely be from the book or the previous edition!
9 hambut // Dec 8, 2007 at 9:41 pm
yea, he said on the email that later parts in chap 8 arnt included, but he did say that we should know some of the examples involving flat belts. anyone have any input on this???
10 hambut // Dec 8, 2007 at 9:47 pm
…and what might the abbreviation “V&M” stand for again?
11 Natalie // Dec 8, 2007 at 9:56 pm
V & M refers to shear and moment problems, with V being the force function and M the moment function.
12 hambut // Dec 8, 2007 at 10:11 pm
nevermind
13 mdb6a // Dec 8, 2007 at 10:14 pm
Which topics are fair game for the final that were not on any test?
What are some other examples of topics for “short, conceptual questions”? I know you said zero force members, but what else?
Please reply, I need to know what to study!
- Martin
14 hambut // Dec 8, 2007 at 10:32 pm
he said centroids would be a good example of a “short conceptual question.” im thinking friction force problem that may but probably wont involve a wedge (basically tip or slip). we already basically told us a shear moment and machine will be on there. the last main problem is up for grabs on what it could be
15 ryan04583 // Dec 9, 2007 at 2:34 pm
where is the test at?
16 Blue // Dec 9, 2007 at 5:10 pm
Test is in the classroom, I believe
17 Blue // Dec 9, 2007 at 6:20 pm
hambut:
regarding the email in which he says which parts of chapter 8 to expect, when was it sent? I can’t seem to find it.
18 hambut // Dec 9, 2007 at 6:27 pm
he sent it on Dec 8 titled “exam info.”
“2. Ch. 8: what exactly is covered? Tip/slip, and the basics of wedges. No screws, no journal bearing, no stuff later in the chapter. “
19 Blue // Dec 9, 2007 at 6:31 pm
hambut:
I must have deleted it by accident. Could you post the rest of the email? It seems very relevant. Thanks.
20 hambut // Dec 9, 2007 at 6:33 pm
I had a couple of questions about exam content, so I thought I’d send a response to everyone.
1. Can you give me more examples of “short” questions? Well, these are really just questions that involve very limited calculations. I mentioned zero-force members in class, but I can also envision a question like “draw the FBD(s) for this structure” (but don’t do any calculations, equilibrium, etc).
2. Ch. 8: what exactly is covered? Tip/slip, and the basics of wedges. No screws, no journal bearing, no stuff later in the chapter.
3. Ch. 9: what exactly is covered? Centroid calcs for composite bodies. You should understand the integral formulations for simple geometries (like the triangle example we did in class). NO fluid pressure. Obviously all the stuff we have done with distributed loads in fair game.
As I said before, V&M is really important. Frames and machines are important. Ch.5 is important. Centroids are important. We have not yet been tested on tip/slip. So, plan accordingly.
Cheers,
ejb
ps anyone studyin at clemons right now? up for working with some others
21 berger // Dec 9, 2007 at 7:39 pm
Many thanks to hambut for publicizing the recent email again here. That’s the extent of it…I just want to be really clear that the problems will come from our text or a previous edition of our text. I might also take problems from our book and change them slightly–ask a slightly different question, or change some numbers, or otherwise alter the question. The point is, the look and feel of the problems will be precisely what you are used to from HW and previous exams.
22 kls2ycc // Dec 9, 2007 at 10:57 pm
So since he said none of the later stuff in ch. 8.. that means no flat belt problems right?
23 corazon_boricua // Dec 9, 2007 at 10:59 pm
Does anybody know at what time Prof Berger will have office hrs tomorrow?
24 John // Dec 10, 2007 at 12:56 am
Does anyone have the conditions to test for tip/slip?
25 D Missy // Dec 10, 2007 at 2:29 am
corazon…. I think he said that he’d be in his office from about 9am on….
and I’d like to know if anyone had any generalizations for tip/slip as well….
26 Kate // Dec 10, 2007 at 12:09 pm
I know this is really last minute, but in response to John…
SLIP: occures when the force of friction (determined through an equalibrium equation) is greater than or equal to the coefficient of static friction times the normal force
TIP: occures when the weight of the object is distributed such that the normal force acts at the corner of the object. To test for slip I think you take the moment about the corner and if the moment arm of the normal force is zero then tip will occure. (not entirely sure though…it kinda depends on the specific problem)
Hope this helps!
27 John // Dec 10, 2007 at 12:14 pm
anyone know where the exam is?
28 brendan22 // Dec 10, 2007 at 12:36 pm
the exam is in our usual classroom
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