A metal piece of mass 160 g lies in equilibrium inside
Question:

A metal piece of mass $160 \mathrm{~g}$ lies in equilibrium inside a glass of water (figure 13-E4). The piece touches the bottom of the glass at a small number of points. If the density of the metal is $8000 \mathrm{~kg} / \mathrm{m}^{3}$

Solution: