Answer to Question #24156 in Geometry for Nazrin

Question

A rod has length 2L and weight W,a weight is fastened to a point on the rod which is a distance d away from its midpoint. The rod with the weight w is in equilibrium in a smooth sphere of radius R(R>L), if the rod makes an angle (alpha) to the horizontal show that ''Tan(alpha)=wd/(W+w)squareroot(R*R-L*L)