Question

When floating a ping-pong ball with a hairdryer, which two forces are balanced?

Answer 1

▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬

There are two forces which are being balanced :

(Ⅰ) The force of gravity which is pushing the ping-pong ball downwards.

(Ⅱ) The force of the air that's coming from hairdryer which is pushing ping-pong ball upwards.

▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬

Answer 2

The force of gravity and the force of air