剛剛看課本
裡面寫到
Scientists spoke of the mass increasing at high speeds. We prefer to keep th
e concept of mass as an invariant, intrinsic property of an object. The use
of the two terms relativistic and rest mass is now considered old-fashioned,
although the terms are still some times used. We always efer to the mass m,
which is the same as the rest mass. The use of relativistic mass often lead
s to mistakes when using classical expressions.
相對論和靜止的質量這個概念已經過時了
我們在使用m時就是指靜止質量
靠北，所以到底要不要用相對論質量阿