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Section 7.2 - Disk and Washer Method

Section 7.2 - Disk and Washer Method

Author: Aaron Smith
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Tutorial

Step One: View Animations

In this section we are learning about revolving a function around an axis.  The most important part of this is being able to visualize it!  To make that a little easier, I found some animations online that will be a good starting place.

Please visit this link and look at the first three animations more closely by pressing "Replay the animation".  Notice what kind of shapes are made as the graph is being revolved.

http://curvebank.calstatela.edu/volrev/volrev.htm

Step Two: Disk Method Video

Step Three: View Washer Method Animation

What kind of shape does the revolution make if there are TWO functions?

Step Four: Washer Method

More animations

More animations if you want to see them:

http://mathdemos.org/mathdemos/washermethod/gallery/gallery.html

 

Blank notes to print

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