A body of density 0.8ρ floats in a liquid of density ρ. The vessel is accelerated vertically upward with constant acceleration a. The fraction of the body's volume submerged is:
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A body of density 0.8ρ floats in a liquid of density ρ. The vessel is accelerated vertically upward with constant acceleration a. The fraction of the body's volume submerged is:

G1 Physics · Accepted Answer

In the accelerating frame both apparent weight and buoyancy contain the same factor g+a. Equilibrium gives ρV_sub(g+a)=0.8ρV(g+a), hence V_sub/V=0.8.