1. The problem statement, all variables and given/known data Four point masses form a rigid body (they are connected by massless rigid rods) given the positions M1= 3kg (2m, 4m, 0m) M2= 2kg (1m, -4m, 0m) M3= 1kg (10m, 2m, 0m) M4= 5kg (-5m, 2m, 0m) Find: A) Moment of inertia of this system when it rotates about x axis B) Moment of interia of this system when it rotates about y axis C) Total rotational kinetic energy in the (A) case when ω= 4 rad/s D) Total rotational kinetic energy in the (B) case when ω= 4 rad/s 2. Relevant equations Rotational K = 1/2Iω2 3. The attempt at a solution I'm really terrible at things with center of mass but I believe we'd have to somehow find the total systems Center of Mass in order to find it's moment(s) of Inertia. However I don't know how to do this with the different axis' (x & y). And as I know from the formula, I can't solve for Rotational Kinetic energy without them Help?