(1) Calculate the mass $m$ needed in order to suspend the leg
shown in Fig, 47 . Assume the leg (with cast) has a mass of
$15.0 \mathrm{kg},$ and its $\mathrm{ca}$ is 35.0 $\mathrm{cm}$ from the hip joint; the sling is
78.0 $\mathrm{cm}$ from the hip joint.
