Related introduction:

A tumbler is a lightweight hollow shell; The lower body is a solid hemisphere, which is relatively heavy, and the center of gravity of the tumbler is in the hemisphere. There is a contact point between the lower hemisphere and the bearing surface. When the hemisphere rolls on the bearing surface, the position of the contact point will change. A tumbler will always stand on a supporting surface with contact points, and will always be a monopod.

Extended data

Related background:

The tumbler was first recorded in the Tang Dynasty. Its shape and weight are like people's. When it is touched, it will swing and then return to an upright position. A tumbler can also be used to describe people who are good at coping with the environment and can maintain power for a long time, which is derogatory.

The principle of tumbler mechanics is widely used in people's production and life. The principle of "tumbler" not only brings fun to people in architectural design, toy manufacturing, daily necessities, automobile structural design, physical fitness, etc., but also makes full use of "objects are light and heavy, so they 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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