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什么是重心(What is the center of mass?)

浏览:265 发表时间:2020-02-12 21:45:09

什么是重心

 任何物体都可以看作是由很多微粒组成,每颗微粒都受到竖直向下的重力作用,由于地球很大,这些力可认为彼此平行。因此,又可以说任何一个物体都受到很多平行力--物体各微粒所受到的重力的作用。所有这些重力的合力就等于整个物体的重力。这些平行力的合力的作用点就叫物体的重心。

 

What is the center of mass?

Any body can be thought of as being made up of many particles, each of which is subjected to a force of gravity going straight down, and these forces can be thought of as being parallel to each other because the earth is so large.Therefore, it can be said that any body is subjected to many parallel forces -- the force of gravity on the particles of the body.The net force of all these forces of gravity is equal to the force of gravity on the whole object.The point at which the combined forces of these parallel forces act is called the center of mass.


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