Figure 55 shows a 100 kg plank supported at its right end by a 7.0-mm-diameter rope with a...

Figure 55 shows a 100 kg plank supported at its right end by a 7.0-mm-diameter rope with a tensile strength of 6.0 × 107 N/m2. How far along the plank, measured from the pivot, can the center of gravity of an 800 kg piece of heavy machinery be placed before the rope snaps?

FIGURE 55