# Speed of light and acceleration

• B
Hi
I understand that accelerating you get closer and closer to the speed of light wrt anything in an asymptotic way, but would acceleration still act the same way as non relativistic speeds (inertia, gyroscope, etc?) even if the speed won't increase almost at all (for example at 0.9999 c)
Thank you

mfb
Mentor
What do you mean by "act the same way"? If you have a rocket that moves at 0.9999 c relative to Earth, you would not notice anything special in the rocket, and you can use the rocket to accelerate as usual*. That is one of the fundamental principles of physics: the laws of physics are the same in every reference frame. Why should you have to care about your speed relative to Earth? There is nothing special about Earth.

*Observers on Earth will measure a different acceleration than you in your rocket.

derek10
Ibix