Question

Which of the following doesn't show that air has pressure?

• A. Ball falling to the ground
• B. Flying a kite
• C. Riding a bicycle against the wind
• D. none of these

Answer 1

The correct option is A Ball falling to the ground

A kite flies with the help of air exerting its pressure along it. riding a bicycle against the wind, means, the air exerts pressure opposite to the direction of bicycle. But a ball falling to the ground is solely responsible for the gravitational force acting between the ball and earth and has nothing to do with air pressure.

Thus a ball falling to the ground doesn't show that air has pressure