Buoyancy of a Balloon

radius of balloon

1

density of gas

0.05

mass of box

25

color of balloon

0.01

time

0

buoyant force of balloon=3.89976×

1

10

N

volume of balloon=

4π

3

m

weight of box=2.45×

2

10

N

This Demonstration shows the relationship between the buoyant force and the force of gravity acting on an object. A spherical balloon, for which you can vary the radius and the density of the enclosed gas, is attached to a box, which you can vary in mass. For the system to rise, the buoyancy must be greater than the weight.