The balloon was tied up and placed under the bell of the air pump. Air was pumped out from under the bell.

The balloon was tied up and placed under the bell of the air pump. Air was pumped out from under the bell. What will happen to the balloon?

The following forces act on the inflated ball: – The force of air pressure inside the ball; – Strength of elasticity of the rubber shell; – Force of air pressure outside. In this case, the force of air pressure inside the ball is directed outward – it “tries” to expand the ball. And the elasticity of the rubber shell and pressure from the outside oppose it and “try” to squeeze the ball. These forces are balanced. When the air is pumped out, the outside air pressure decreases. This means that the force of air pressure inside the ball becomes larger, the forces opposing it, and the ball begins to expand until the forces are again balanced. If the expansion of the rubber shell exceeds the maximum deformation allowed for it, the ball will burst.