## Homework 5, due September 29, 2011.

Due at noon on Thursday, September 29, 2011.
goodwine
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### Homework 5, due September 29, 2011.

Reading: You should have read everything from Chapter 1 through Chapter 4 by now. The first exam will cover this material.

Exercises: 4.3, 4.4, 4.7, 4.9, 4.10, 4.12, 4.14, 4.19 and 4.22.
Bill Goodwine, 376 Fitzpatrick
pat

### Re: Homework 5, due September 29, 2011.

Can you give a suggestion on how to solve Problem 4.14? I do not know where to start.
pat

### Re: Homework 5, due September 29, 2011.

Also, I'm confused as to how to solve for the homogeneous solutions in Problem 4.22 because it involves x and y terms. How should we do this?
goodwine
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Joined: Tue Aug 24, 2004 4:54 pm
Location: 376 Fitzpatrick
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### Re: Homework 5, due September 29, 2011.

pat wrote:Can you give a suggestion on how to solve Problem 4.14? I do not know where to start.
Write F=ma for the board. The forces on the board are at two points due to friction by each roller. If the board moves the normal force supported by each of the rollers changes.

I actually had this on the final exam one year.
Bill Goodwine, 376 Fitzpatrick
goodwine
Posts: 1596
Joined: Tue Aug 24, 2004 4:54 pm
Location: 376 Fitzpatrick
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### Re: Homework 5, due September 29, 2011.

pat wrote:Also, I'm confused as to how to solve for the homogeneous solutions in Problem 4.22 because it involves x and y terms. How should we do this?
Bill Goodwine, 376 Fitzpatrick
jszczudl

### Re: Homework 5, due September 29, 2011.

On 4.12 are we supposed to account for the gravitational force?
astumpf

### Re: Homework 5, due September 29, 2011.

What are you looking for when you say to get approximations to steady-state solutions for equations by looking at graphs like in 4.4 or 4.7? There's nothing remotely similar to that problem in the book or what we did in class. thanks.
goodwine
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Joined: Tue Aug 24, 2004 4:54 pm
Location: 376 Fitzpatrick
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### Re: Homework 5, due September 29, 2011.

astumpf wrote:What are you looking for when you say to get approximations to steady-state solutions for equations by looking at graphs like in 4.4 or 4.7? There's nothing remotely similar to that problem in the book or what we did in class. thanks.
The graphs present all the information you need for the steady-state solution. The "approximation" partly only means that you can only approximately read the values from the graphs. Just ask yourself what those graphs are showing.
Bill Goodwine, 376 Fitzpatrick
goodwine