论质量体的质量与其速度的关系

he concept of physical speed of mass body is discussed. The relation between the mass and its speed of a mass body has only two options: irrelevant and relevant, which is a "one of two" problem. There are two kinds of relevant cases: the mass of mass body increases with the increase of its speed, and the mass of mass body decreases with the increase of its speed. Through the investigation and induction of a specific example, a mathematical model of mass increasing with speed is constructed. The special case is the mass speed relation in special relativity; at the same time, a mathematical model of mass decreasing with the increase of speed is constructed based on the reciprocal of Mach number. These two mathematical models are counter examples and contradictory to each other. Through mathematical derivation and logical analysis, it is concluded that the mass of mass body is independent of its speed.