Question The problem consists of a bar of weight $W$ to which a sphere of also of weight $W$ is fitted at one end. The conbination is released from rest, with the bar horizontal. How will the combination fall if air resistance can be neglected?
For convenience, I have marked the C.G. of the sphere as $G_S$ and that of the bar only as $G_B$. The C.G. of the combination is halfway between them, shown by the green $G_C$. My answer is that the combination will rotate about $G_B$ (centre of the bar) as it falls. I wonder if I am right.