A beam of length L and mass M rests on two pivots. The first pivot is at the left end, taken as the origin, and the second pivot is at a distance l from the left end. A lady of mass m starts at the left end and walks toward the right end. When the beam is on the verge of tipping, determine symbolic expression for
A) the normal force exerted by the second pivot in terms of M, m, and g.
B) the lady's position in terms of M, m, L, and l.
C) Determine the minimum value of l that will allow the lady to reach the end of the beam without it tipping.