Use the conditions of mechanical equilibrium to express (vec{F}_{mathrm{hf} y}^{mathrm{c}}) in Figure (12.11 b) in terms of

Question:

Use the conditions of mechanical equilibrium to express $\vec{F}_{\mathrm{hf} y}^{\mathrm{c}}$ in Figure $12.11 b$ in terms of $\vec{F}_{\mathrm{Ef}}^{G}$ and $\vec{F}_{\mathrm{bf}}^{\mathrm{c}}$. Let the distance between the ball and the pivot be $\ell$ and the distance from the point where the biceps muscle is attached to the pivot be $\ell / 5$.

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