1. The problem statement, all variables and given/known data A uniform wooden plank of length L = 6.0m and mass M = 90kg rests on top of two sawhorses separated by D = 1.5m, located equal distances from the center of the plank. Your cousin Throckmorton tries to stand on the right-hand end of the plank. If the plank is to remain at rest, how massive can Throckmorton be? 3. The attempt at a solution How do I know the Xcg value for this problem since there are two sawhorses supporting this plank?