READING TIME: < 1 minute
The video clip below, taken from Youtube demonstrates a well-known party trick. A coin is placed on a card and placed over the mouth of a bottle. Watch the video to see what happens when the card is flicked away with a finger.
And the question is: Why did the coin drop into the bottle and not fly off with the card?
Concepts involved:
- Newton’s first law of motion, inertia, motion, rest.
