Material objects cannot be accelerated up to lightspeed because
A) of the curvature of space, which increases toward infinite curvature as the object approaches lightspeed.
B) their length decreases [toward zero] as they approach lightspeed.
C) their inertia increases [toward infinity, i.e., without bound] as they approach lightspeed.
D) nothing can move at the speed of light.
E) Nonsense-- objects can be sped up to lightspeed, as we can see from the example of light itself.

Question

Quizplus · Accepted Answer

As an object approaches the speed of light, its relativistic mass increases, requiring more and more energy to continue accelerating it, approaching infinity as it nears lightspeed.

Material Objects Cannot Be Accelerated Up to Lightspeed Because