Where is the center of gravity of the tumbler?

In the middle of the bottom. Because of its low center of gravity, not easy to fall, regular shape, light weight at the top and good stability, it is called "tumbler". The shape of the tumbler looks like an egg, which is very funny and very popular in the toy world.

The origin of the tumbler

1, the principle of not falling down

The lower the center of gravity of a regularly shaped object, the more stable it is. When the tumbler is in balance in an upright position, the center of gravity is the lowest. When the balance position deviates, the center of gravity always rises, which is a stable balance. So the tumbler won't fall down no matter how he swings.

2. Historical origin

In ancient times, "tumbler" was a metaphor for those officials who managed officialdom, played politics all day, kept their jobs and kept their prized trust, and were truly "tumblers".