A body with a volume of 100 cm2 is immersed in water. Determine the value of the buoyancy force acting on this body.

The buoyancy or Archimedes force is determined by the formula:
Fa = ρ * g * V, where Fa is the force of Archimedes, ρ is the density of the fluid, g is the acceleration of gravity, V is the volume of the submerged part of the body

For the calculation, we convert the volume of a body 100 cm3 to cubic meters
1 cubic meter = 1000’000 cubic cm
100 cubic cm = 100: 1000’000 = 0.0001 cubic meters

Let’s find the buoyancy force.
Fa = 1000 [kg / m3] * 9.8 [m / s2] * 0.0001 [cubic meter] = 0.98 [N]

Answer. 0.98H

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