超、失重的判断需要满足的前提条件

Prerequisites for Judging the Need for Super and Weightlessness

考虑到提出超重和失重概念的实际意义,超重、失重的定义需要满足一定的前提条件:即选惯性参考系,物体最多只受重力和悬挂物(或支持物)的弹力时;或选相对所研究物体静止的参考系,物体最多只受重力、惯性力和悬挂物(或支持物)的弹力时。而且超重、失重应该是与物体在地球上的重力相比较。

Considering the practical significance of the concept of overweight and weightlessness, the definition of overweight and weightlessness needs to meet certain preconditions： that is, the inertial reference frame is selected, and the object is only subjected to the elasticity of the gravity and the suspension（or the support） at most; Study the stationary reference frame of an object. The object is only subjected to the force of gravity, inertial force and suspension（or support）. Moreover, overweight and weight loss should be compared with the gravity of the object on the earth.