A body of density ρ sinks in a liquid of density ρ_L. The densities ρ and ρ_L are related as:

1. ρ = ρ_L
2. ρ < ρ_L
3. ρ > ρ_L
4. nothing can be said

In what direction and at what point does the buoyant force on a body due to a liquid, act?

Why is a force needed to keep a block of wood inside water?

A body experiences an upthrust F₁ in river water and F₂ in sea water when dipped up to the same level. Which is more F₁ or F₂ ? Give reason.