Moment of inertia - displaced axis

[finitefemmet]

Hi,

I need some help, I have a system with 3 cylinders (I got the center of mass for the system). Now I need to calculate the moment of inertia for the system.

I have tried to find some examples or general information, but they all show when the axis either is centered within the object or on the surface. This problem has a distance from the system and is not "touching" any surfaces. I figured out distance from the center of mass too the revolving axis. But I can't get my head around how I can solve this with the "displaced" axis so to speak.

Greatfull for every answer,

thanks!

 

[Filip Larsen]

Perhaps you can use the parallel axis theorem [1].

[1] http://en.wikipedia.org/wiki/Parallel_axis_theorem

 

[finitefemmet]

That did the trick;)