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I need help finding the moment of inertia of a cone using triple integral. can you also explain how can we get dV with details?

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- Thread starter homad2000
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- #1

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I need help finding the moment of inertia of a cone using triple integral. can you also explain how can we get dV with details?

- #2

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the axis of rotation is around the central axis

- #3

gneill

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Look up "volume element in cylindrical coordinates". http://keep2.sjfc.edu/faculty/kgreen/vector/Block3/jacob/node9.html" [Broken] that may help.

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consider any horizontal part of cone (that looks like a disk) ... you know moment of inertia of disk ... write it for any disk of radius are and thickness dr ...then integrate it from r=0 to max r

You see there are many ways to find an answer ... just use concepts you learned from the previous questions for new ones !!!!!

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