Given:
m = 2.0 kg, mass of the balloon and enclosed gas
V = 5.0 m³, volume of balloon.
Calculate the effective density of the balloon.
ρ = m/V
= 2/5
= 0.4 kg/m³
The density of air is 1.3 kg/m³, which is denser than the balloon. Therefore the balloon will rise.
Answer: The balloon will rise because its density is less than that of air.
