5 \, kg$. The distance of the center of gravity (CG) of the leg from the hip joint is $d_l = 33.5 \, cm = 0.335 \, m$. The distance of the sling from the hip joint is $d_s = 81.0 \, cm = 0.810 \, m$. We need to find the mass $m$ such that the system is in
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