Classical Mechanics
# Mechanics Warmups

In the video above, the smallest domino knocks over a bigger domino that is taller, and heavier than itself. Subsequent dominos do the same so that, eventually, the chain knocks down a domino that's much, much bigger than the first one.

How is this possible?

**after a long time**, if the refrigerator door is left open?

**Assumptions**

- We are thinking about the period in which the cup still contains water.
- The walls of the paper cup are very thin.

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