1. The problem statement, all variables and given/known data 2. Relevant equations I'm dumbfounded by this problem. I can solve the (I think) harder problems with two fixed points and three rod segments. All the examples given in this book are of such "harder" problems and I have absolutely no example that resembles this problem to use as a reference. It is stated that I should solve the relative-velocity equations. This equation being: Va = Vb + Va/b (Velocity of A is equal to the Velocity of b + the apparent velocity of A as seen from B). Please note that these are vectors. I'm also aware of V = wr, which translates to V = w X r in vector form. 3. The attempt at a solution I have no idea that to do. In all the other problems I had a fixed reference point that I could use. Here in the relative-velocity equation it seems like I only have one segment, how am I supposed to use the relative-velocity equation??! I'm starting to think this is unsolvable using the requested equation. Please help... thanks.