blem 3. A beam resting on two pivots has a length of L = 6.00 m and mass M = 90.0 kg The pivot under the left end exerts a normal force F1 on the beam, and the second pivot placed a distance l = 4.00 m from the left end exerts a normal force FN2. A woman of mass m = 55.0 kg steps onto the left end of the beam and begins walking to the right, as in Fig. 3. The goal is to find the woman's position when the beam begins to tip. (a) Sketch a free-body diagram of the beam with the woman standing x-meters to the right of the first pivot. an incline (b) Where is the woman when the normal force F1 is the greatest? (c) What is FN1 when the beam is about to tip? (d) Use the force equation of equilibrium to find the value of FN2 when the beam is about to tip. (e) Using the result of part c) and the torque equilibrium equation, find the woman's position when the beam is about to tip. (f) Check your answer by using a different axis of rotation