A uniform beam resting on two pivots has a length L=6.00 m and mass M=90.0 kg. The pivot under the left end exerts a normal force n1 on the beam, and the second pivot located a distance l=4.00 m from the left end exerts a normal force n2. A woman of mass m=55.0 kg steps onto the left end of the beam and begins walking to the right as in the figure. The goal is to find the woman’s position when the beam begins to tip.
Please correct me if I'm wrong in any of these things, but how do I graph the normal force after the tipping point? I am very confused on what equations I am going to use