Why you cannot push out a ball from a funnel by simply blowing. [📹 Walter Lewin]

The air just goes around

Scan any documents, convert images into text, PDF files, etc. 👍

Can I push

If the initial push is strong enough, you can 🤷 *imagine a supersonic wind tunnel hooked to the opening* As the ball rises, the surrounding fluid path x-section increases until the ball is no longer "blocking" the full path