How must an object be moving for one to be able to use the theory of special relativity to describe the object?
A) The object must be moving close to the speed of light; how speed and direction change is not important.
B) The object must be moving at a constant speed in a straight line; how fast it is moving is not important.
C) The object must be moving in a constant direction; how its speed changes is unimportant.
D) The object must be moving at a constant speed; whether the direction of motion changes is unimportant.

Question

Quizplus · Accepted Answer

Special relativity applies to objects moving at constant velocity, meaning constant speed in a straight line, regardless of how fast they are moving.

How Must an Object Be Moving for One to Be