Question

Mini-submarine has the total volume of 50m3. Its mass is 5500kg. Can it carry a load of another 9000 kg?

Answer 1

$F=\rho gV=1000\cdot9.81\cdot50=490500\ (N)$

$m=5500+9000=14500\ (kg)$

$W=mg=14500\cdot9.81=142245\ (N)$

$490500>142245$ . So, it can carry this load.