meaningless question(???) I have faced a weird question: Examine if the cylindrical polar co-ordinates represent a set of genralized co-ordinates? To me it looks a meaningless question. Unless we are given a configuration to describe,how can we be able to predict?For a point particle it may reresent---(if rho, theta and phi describe fully the configuration,each being independent of other), but for a rigid body, it certainly does not. For, we are to consider the Eulerian angles which give the space orientation of the body. Please comment on it,so that the thing gets clarified. (Please Note that this is not a homework problem---I am asking this to clarify my idea).