# Hw 9 Problem 11

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A vaulter holds a 32.1-N pole in equilibrium by exerting an upward force  with her leading hand and a downward force  with her trailing hand as shown in the figure below. Point C is the center of gravity of the pole. (Let L1 = 2.25 m, L2 =1.35 m, and L3 = 0.900 m.)

(a) What is the magnitude of ?

(b) What is the magnitude of ?

Use $\sum F=0$ and $\sum \tau=0$, which gives:$$U-D-F=0$$ and $$DL_3-FL_2=0$$