Buoyancy

The buoyancy depends on the volume (V ) of the dipped body and the density of the liquid substance ( ρ ) and is calculated by the formula:

The buoyancy F_A acts against the weight force (G ) of the dipped body (picture below).

• If F_A < G, the body will sink.
  
• If F_A > G, the body will rise.
  
• If F_A = G, we must distinguish between two cases:
  
  • If the dipped body and the liquid substance have the same density, the body will float in the liquid sustance.
  • If the dipped body has a smaller density than the liquid substance, the body will swim on the surface of the liquid substance.