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== Special relativity and evdience ==

== Special relativity and evdience ==

Many objects have been accelerated to velocities near the speed of light (in particle colliders) and it is easily observed that the rate at which those objects speed up as a constant force is applied is (very precisely) consistent with special relativity and not Gallilean relativity.  That is, as their measured speed approaches the speed of light, that speed increases less and less in response to each "push" even though the "pushes" remain the same strength, thus apparently violating Newton's F = ma.  On the other hand, Einstein's famous E = lambda * mc^2 appears to describe their rate of acceleration very accurately.  I don't understand how this article proposes to surmount that objection. [[User:ZeroThree|ZeroThree]] 15:46, 28 October 2012 (EDT)

Many objects have been accelerated to velocities near the speed of light (in particle colliders) and it is easily observed that the rate at which those objects speed up as a constant force is applied is (very precisely) consistent with special relativity and not Gallilean relativity.  That is, as their measured speed approaches the speed of light, that speed increases less and less in response to each "push" even though the "pushes" remain the same strength, thus apparently violating Newton's F = ma.  On the other hand, Einstein's famous E = lambda * mc^2 appears to describe their rate of acceleration very accurately.  I don't understand how this article proposes to surmount that objection. [[User:ZeroThree|ZeroThree]] 15:47, 28 October 2012 (EDT)

== Mass depending on direction ==

== Mass depending on direction ==