What would cause a volleyball to float on water?

google "Archimedes' principle"

-2/10

The air inside of it.

The air inside of it is lighter than the air in the water but heavier than the air around it. Increase in water temp causes decreased buoyancy and vise versa.

Pointing Out the Obvious wrote:

The air inside of it.

Being placed in water?

Thank you. But, what's weird is that it sinks about 80% of the time (same pond). Granted, the water temp. does vary about 40F between summer and winter.

If you yell "Wilson!" it will float forever.

Aw I cried at that bit.

Being less dense than the water (and you)

magnets?

Only in the northern hemisphere.

Well you play volleyball in the summer not the winter

The ship that is carrying it.

Global warming!

Hydrophobia

WILSON!!!!!!!!!!

Mass x gravity is pulling it down. The weight of the water displaced is pushing it up. When those two forces equal each other, the net force is zero and the ball will go neither up or down and will float at the depth it is at.

study to know wrote:

Mass x gravity is pulling it down. The weight of the water displaced is pushing it up. When those two forces equal each other, the net force is zero and the ball will go neither up or down and will float at the depth it is at.

Why?

The mass is the sum of the ball and the air in it.