1. The problem statement, all variables and given/known data Word for word, from the problem: "A person’s center of mass is easily found by having the person lie on a reaction board. A horizontal 2.5-m-long, 6.1 kg reaction board is supported only at the ends, with one end resting on a scale and the other on a pivot. A 60 kg woman lies on the reaction board with her feet over the pivot. The scale reads 25 kg. What is the distance from the woman’s feet to her center of mass?" 2. Relevant equations T=Iα (torque = moment of inertia times angular acceleration) T=rFsin∅ (torque = radius times the force times sine of the angle between the radius and the force) T=rFt (torque = radius times component of force perpendicular to the moment arm) l=rmvsin∅ (angular momentum = radius times mass times velocity times the sine of the angle between the radius and the force) ????? 3. The attempt at a solution So the scale reads 25kg, and I thought maybe that force could be found using F = ma. So I did that and got a force of 245N. I figure that force is perpendicular to the moment arm, so I multiplied it by 2.5m and got a torque of 612.5N⋅m. From there I'm kind of stuck though. I think it maybe also has something to do with angular momentum?