Eddit Roll Bearing 424 The figure above shows a long, nonconducting, massless rod of length L, pivoted at its center and balanced with a block of weight W at a distance x from the left end. At the left and right ends of the rod are attached small conducting spheres with positive charges q and 2q, respectively. A distance h directly beneath each of these spheres is a fixed sphere with positive charge Q. NOTE: Express your answer in terms of the given variables, use permittivity constant en (a) Find an equation for the distance a when the rod is horizontal and balanced. T = 1 + qQ 4 # 50 w h2 X (b) What value should h have so that the rod exerts no vertical force on the bearing when the rod is horizontal and balanced? h= 3qQ VATEOW X