1. The problem statement, all variables and given/known data Four tiny spheres are fastened to the ends of two rods of negligible mass lying in the xy plane. figure is illustrated below. 0 | o | o | 0 2. Relevant equations 3. The attempt at a solution I see I can derive the problem using equations to answer my question. But here is a statement the textbook made In part A we are ask "if the system rotates about the y axis" whereas in part B, we are asked "rotate the system about z axis" In this problem, we will expect all four spheres will be revolving when it is revolve about z axis. How did the author come up with this statement using W-K theorem?