Objects that are light on the top and heavy on the bottom are relatively stable, that is, the lower the center of gravity, the more stable it is. When the tumbler is in equilibrium in an upright state, the distance between the center of gravity and the contact point is the smallest, that is, the center of gravity is the lowest. After deviating from the equilibrium position, the center of gravity always rises. So the balance of this state is a stable balance. Therefore, no matter how the tumbler swings, it will not fall.

Make the line of action of gravity deviate from the fulcrum, and make gravity produce a moment on the fulcrum, that is, the resistance distance. With the increasing tilt angle of the tumbler, the offset of the line of gravity action increases, and the resistance moment also increases, finally achieving the balance with the external force moment. This is how the tumbler's ability to resist external interference and maintain balance is formed.

Extended data:

In terms of toys, daily necessities and sports equipment, a tumbler cup relates to a cup-shaped container, which is characterized by a hollow and thickened round bottom with light top and heavy bottom. The weight is concentrated in the center of the cup bottom, and the bottom contact surface is very small, so that the cup can shake when moving.

The principle of tumbler mechanics is widely used in people's production and life. In architectural design, toy manufacturing, daily necessities, automobile structural design and physical fitness.

The principle of "tumbler" not only brings fun to people, but also makes full use of the feature that "the objects that are light on the top and heavy on the bottom are more stable because of their low center of gravity", greatly improving the common tumbler toys, tumbler cups and tumbler sandbags in various facilities.

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