1. The problem statement, all variables and given/known data A non-uniform plank of wood XY is 2.50m long and weighs 950N. Force-meters (spring balances) A and B are attached to the plank at a distance of 0.40m from each end, as illustrated in the Figure below http://img266.imageshack.us/img266/2377/physicsp23bgh5.png [Broken][/URL] When the plank is horizontal, force-meter A records 570N (i) Calculate the reading on force-meter B (ii) Determine the distance of the center of gravity from the end X of the plank. 2. Relevant equations Moment = Force x Perpendicular Distance 3. The attempt at a solution (i) [tex]A + B = 950N[/tex] [tex]B = 950 - 570 = 380N[/tex] (ii) I don't know how to solve this question, need help!