There are generally two ways to find the center of gravity of an object, one is that the mass of the object is uniform, and the other is that the mass is uneven or the shape is irregular. Here are two ways to find the center.

The center of gravity of an object with uniform mass distribution and regular shape is located in the geometric center of the object, such as the center of gravity of a uniform sphere. The center of gravity of an object with uneven mass distribution is not only related to its shape, but also to its mass distribution.

Hanging method-hanging method can find out the center of gravity of thin plates with uneven quality or irregular shape: hang the thin plates to make them balanced. At this point, the center of gravity must be in the direction of the suspension line. If you change to another lifting point, the new lifting wire must also pass through the center of gravity. The intersection point is the center of gravity of the object.