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Moment of inertia of a cone

  • Thread starter homad2000
  • Start date
  • #1
19
0
hello,
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?
 

Answers and Replies

  • #2
19
0
the axis of rotation is around the central axis
 
  • #3
gneill
Mentor
20,793
2,773
Look up "volume element in cylindrical coordinates". http://keep2.sjfc.edu/faculty/kgreen/vector/Block3/jacob/node9.html" [Broken] that may help.
 
Last edited by a moderator:
  • #4
1,137
0
you can even do this ...

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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