Question

Calculate the buoyant force on a cube of metal with an edge of 1.0 cm that is placed in salt water. The density of the metal is 7000 kg/m3, and the density of the salt water is 1000 kg/m3

Answer 1

The buoyant force on a cube of metal is

$$F_b=\rho_{SW}gV=\rho_{SW}ga^3$$

$$F_b=(1000)(9.8)(0.01)^3=0.0098\ N$$