Chapter 12, Problem 69GP

A 20.0-m-long uniform beam weighing 650 N rests on walls A and B, as shown in Fig. 12–83. (a) Find the maximum weight of a person who can walk to the extreme end D without tipping the beam. Find the forces that the walls A and В exert on the beam when the person is standing: (b) at D; (c) at a point 2.0 m tο the right of B; (d) 2.0 m to the right of A.

FIGURE 12–83

Problem 69.