One of the most important principles of physics is at work when two kids play on a teeter-totter. You probably know that for two weights on opposite sides of the fulcrum to balance, those weights need to be placed at just the right distance from the fulcrum. Suppose the 50 pound weight is placed at one end of a teeter totter, 6 feet from the fulcrum. How far from the fulcrum should a person sit to balance the 50 pound weight if the person weighs 50 pounds