Description
The foam ball can be suspended in the air, which is based on the Bernoulli principle, that is, the pressure exerted on the plane of a moving air in a right angle to the direction of its motion. The blower makes pressure around the foam ball smaller than the top air pressure, because the top air is stationary, so the atmospheric pressure from the bottom of the sphere will keep the table tennis ball suspended in the air. Even an airplane made of steel , which is much heavier than air, can fly in the air. The air passing over the wing exerts less pressure than the air under the wing, so the air pressure under the wing provides the aircraft with buoyancy and make it fly.