Recent content by antonov

We get that the total mass is m.

About A2 yes it's supposed to be the semicircle. Area of semicircle A=(pi*r^2)/2 The radius is 2L. A3 is a mistake from my part I saw yesterday total area should be 13.1415926 I divide it so we get the mass och the plate. And then multiply the mass from each area to the I of the same area. Or at...

I got it from this table of MOI we got from our teacher. I was torn because this is 3D and my model is 2D but yeh.

I don't really know how to break it down, this is the way we learned it. And then looking up the formulas for MOI in a formula collection.

I have this moment of inertia problem and is a little confused on the semicircle part and if the rest is really right? I get over 10 if I calculate it in crew CAD but by hand I get 7,568032142. What is right and what am I doing wrong?