BuoyancyHardQuestion 30920
Question
A body weighs 50 N in air and 30 N in water. Volume of body is (g = 10 m/s², ρ_water = 1000 kg/m³):
- A2×10⁻³ m³Correct
- B3×10⁻³ m³
- C5×10⁻³ m³
- D2×10⁻² m³
Correct answer
2×10⁻³ m³
Explanation
Buoyant force = 50 − 30 = 20 N. V = F_b/(ρ_water × g) = 20/(1000×10) = 2×10⁻³ m³.