Special relativity can be used to study an object in which frame of reference?

A. A frame of reference that is moving at a constant velocity

B. A frame of reference that is speeding up

C. A frame of reference that is moving in a circle

D. A frame of reference that is slowing down

Answer;

A. A frame of reference that is moving at a constant velocity

Explanation; Special relativity is applied to reference frames that do no accelerate. If a reference frame moves with constant velocity relative to an inertial reference frame, it also is an inertial reference frame. There is no absolute inertial reference frame, meaning that there is no state of velocity which is special in the universe. Einstein's theories of relativity are a result of the contradiction between Newton's laws of motion and Maxwell's equations.