# Math Help - physics

1. ## physics

According to the special theory of relativity, all laws of nature are the same in reference systems which ____ relative to an inertial system.

a. have a constant acceleration
b. move at a constant velocity
c. move in ellipses
d. move in circles at a constant speed

2. ## Re: physics

Originally Posted by Louisana1
According to the special theory of relativity, all laws of nature are the same in reference systems which ____ relative to an inertial system.

a. have a constant acceleration
b. move at a constant velocity
c. move in ellipses
d. move in circles at a constant speed
Which do you think is correct? And why? (I'm a teacher. I always ask the "why" questions. )

-Dan

3. ## Re: physics

From Wikipedia:

Special principle of relativity: If a system of coordinates K is chosen so that, in relation to it, physical laws hold good in their simplest form, the same laws hold good in relation to any other system of coordinates K' moving in uniform translation relatively to K.