Instructional Video

Volumes by Washers

Curated and Reviewed by Lesson Planet

Here's an AP Calculus resource that works an example problem of finding the volume where the cross sections of a solid are washer shaped. In the example the axis of rotation is vertical, creating horizontal washers.

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Additional Tags
Instructional Ideas
  • Use calculus visualization software to see the solid of rotation
Classroom Considerations
  • Pupils should be able to graph conic sections
  • Individuals need to know how to calculate definite integrals using a calculator
  • This video is hosted on YouTube
Pros
  • The presenter acknowledges when some integrals have not been formally introduced within the series
  • The video shows that sometimes it is not worth the work to simplify an expression
Cons
  • None