Can a Rock Be Accelerated Up to Lightspeed

question 109

Multiple Choice

Can a rock be accelerated up to lightspeed?

• A) No, because any material object's length decreases to zero as the object approaches lightspeed.
• B) No, because the theory of relativity states that it is impossible for anything to move at lightspeed.
• C) No, because any material object's mass becomes infinite as the object approaches lightspeed.
• D) Yes, as we can see from the example of light itself.
• E) Yes, by projecting the object at a sufficiently high speed from a reference frame that is already moving at a high speed.

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