A meter stick is pivoted the 50-cm mark but does not balance because of nonconformities in material. 150 g and 200 g weights ar placed at the 10-cm and 75-cm marks to balance the meterstick. When the weights are interchange, the pivot point is at the 43-cm mark. find the mass of the stick and the center of gravity. I've worked the problem seven ways from sunday. this keyboard is giving me a hard time, I can't really write it all out for you. :( keys are sticking.