3)
The assembly is made from a steel hemisphere,
$\rho_{st} = 7.80 \text{ Mg/m}^3$, and an aluminum cylinder,
$\rho_{al} = 2.70 \text{ Mg/m}^3$. Determine the height $h$ of the cylinder
so that the center of gravity of the assembly is located at
$\bar{z} = 160 \text{ mm}$.
Draw a sketch showing all necessary dimensions.
80 mm
160 mm