Introduction - If you have any usage issues, please Google them yourself
In modern physics, many experiments have been done with high accuracy to prove that the inertial mass of an object is always proportional to its gravitational mass. With the proper unit chosen, the inertial mass and gravitational mass Equally in magnitude, so we usually do not distinguish between the two qualities of an object. In Einstein's general theory of relativity, it is also considered that inertial mass and gravitation mass are equivalent. What happens when the speed of the object approaches the speed of light? Below we study this situation.