Formula for inertia

  • Thread starter jaguar57
  • Start date
  • #1
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Calculating for a section of an engines connecting rod that is always changing speed
I have seen different formulas for inertia. Must be different types.
Since it is changing speed I guess I am looking for the inertia that is against that change.
any help is much appreciated. I know ya'll get a lot of questions on this forum.
 

Answers and Replies

  • #2
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Assuming that you are treating the con rod as a rigid body, the MMOI is simply a constant, the integral of r^2 dm. Changing speed has no impact on the MMOI value.
 
  • #3
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I think maybe the formula I need is the one that includes velocity which is
KE= .5 x kg x velocity^2
 
  • #4
CWatters
Science Advisor
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Energy an inertia are different things. We can't tell what you need.
 
  • #5
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If you don't know what you need, it will be very difficult for anyone else to help you because we don't know either.
 

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