Length contraction and time dilation would be everyday events. The momentum and kinetic energy of moving objects would increase rapidly, making it expensive and difficult to change anything’s state of motion. Finally, nothing on Earth, including rockets, light, or radio signals, could move faster than 25 m/s.
Work Step by Step
If the speed of light were 25 m/s, relativistic effects would be visible at everyday speeds. See the figures in the textbook of Mr. Tompkins.