A 4 x 0.3 x 0.25 reinforced concrete slab is submerged in water at half its volume. What is the Archimedean force acting on it?

Archimedean force is determined by the formula
F = p * V,
where
F – strength;
p is the specific gravity of water;
V is the volume of displaced water.

Let’s calculate the volume of displaced water
V = 4 * 0.3 * 0.25 / 2 = 0.15 m³.

Specific gravity of water from the reference book
p = 9810 N / m³.

Substitute in the formula and find
F = 9810 * 0.15 = 1471.5 N.

Answer: 1471.5 N.