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1

2 Adapted by Mrs. King from http://tutorial.math.lamar.edu/AllBrowsers/2413/VolumeWithRings.asp

3 Disc Method:

4 What if the “slices” aren’t solid? pigsflyguy.com/sitebuildercontent/sitebuilderfiles/sec_07_02_washer_method.ppt

5 Washers!

6 Washers Consider the area between two functions rotated about the axis Now we have a hollow solid We will sum the volumes of washers f(x) a b g(x)

7 Washers f(x) a b g(x) Outer Function Inner Function

8 The Method of Washers Find the volume of the solid formed by revolving the region bounded by y =  (x) and y = x² over the interval [0, 1] about the x – axis. glory.gc.maricopa.edu/~avolpe/230page/7.2calc2discsnadwashers.ppt

9 Solution:

10 Homework Page 465 #5, 6, 13a, 14a http://mathdemos.gcsu.edu/mathdemos/washer method/gallery/gallery.html

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