7. Which is true for both uniform velocity and uniform acceleration as depicted by velocity-time graphs? a) The velocity -time graphs for both uniform velocity and uniform acceleration are always straight lines. b) The velocity -time graphs for both uniform velocity and uniform acceleration are always parallel to the x-axis c) The velocity -time graphs for both uniform velocity and uniform acceleration are always parallel to the y-axis d) The velocity -time graphs for both uniform velocity and uniform acceleration are always

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Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.