A ping-pong ball can be held in a stream of air from a hair dryer because:

  1. it has no weight
  2. the air pushes it from below only
  3. it is magnetic
  4. the fast air around it has lower pressure, pulling it back into the stream
Answer

D) the fast air around it has lower pressure, pulling it back into the stream

Bernoulli effect keeps it centred. SLO P-11-B-39 · Application

Physics MCQ · More Fluid Statics and Dynamics MCQs · Practise