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 nl. 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 below. What is nlwhen the beam is about to tip?
