Baconman
When you are working with formulas that involve relativity you will find that objects do in fact gain mass as they travel faster. This happens at such an insignificant rate though that it is really only worth considering if the object is travelling at near the speed of light.
Shwetabh
Only when they start approaching the speed of light.(when the speed comes in order of 10^7 ms-¹)
claudia
my d!ck do