Recent content by Spaceflea

Thanks so much for the reply! But I am confused over which axis and mass I should use instead. Obviously not point A...

Homework Statement Two particles, each of mass m, are attached one to each end of a diameter PQ of a uniform circular disk, of mass 4m, radius a with its centre at O. The system is free to rotate about a horizontal axis through A, a point on PQ such that OA = b as indicated in the diagram...