How to float a ping pong ball on air - The Coandă Effect

The video demonstrates an experiment using a ping pong ball and a stream of air to explore the Coanda effect. The ball floats due to the balance of upward air pressure and gravity. The Coanda effect, where air follows a curved surface, is explained as the reason the ball remains stable in the air stream. The video concludes with an invitation to try the experiment at home.

What causes the ping pong ball to float in the stream of air?

• The air pushes the ball sideways.

• The air pushes the ball downward.

• The air pushes the ball upward, balancing gravity.

• The air creates a vacuum under the ball.

Why doesn't the ball move side to side in the airstream?

• The air pressure is equal on all sides.

• The ball is too heavy to move sideways.

• The air is not strong enough to move the ball.

• The ball is glued to the airstream.

What is the Coanda effect?

• The tendency of air to stop moving.

• The tendency of air to move in a straight line.

• The tendency of air to follow a curved surface.

• The tendency of air to create high pressure.

How does the Coanda effect contribute to the ball's stability?

• It increases the ball's weight.

• It creates a high-pressure area above the ball.

• It pulls the ball toward the low-pressure area.

• It stops the air from moving.

What happens if the ball moves to one side of the airstream?

• The ball spins rapidly.

• The effect increases on the opposite side, pulling the ball back.

• The ball is pushed further to the side.

• The ball falls out of the airstream.