1. The problem statement, all variables and given/known data A dunmbell is made up of a solid rod of mass 0.5Kg and two solid spheres each of mass 2Kg. The rods length is 1.6m and the spheres are both of radius 0.2m. 1. I need to find the moment of inertia of the dumbell about an axis through its centre of mass and perpendicular to the rod. 2. Also i need to find the moment of inertia of the dumbell about an axis through the centre of one of the spheres and perpendicular to the rod 2. Relevant equations Moment of interia of rod about it's centre is I = (M x L^2)/12 Moment of interia of solid sphere about it's centre is I = (2 x M x R^2)/5 3. The attempt at a solution I did the porblem using these equations but i'm gettin complety different answers to the right ones. Can anybody point me in the right direction with this? Is there another equation i'm missing here?