Take the tour ×  Imagine a bar  spinning like a helicopter
propeller,   $$V = \omega * r$$   $$\omega = V / r$$        What
do you say?     What do you think?  share|improve this question
add comment  7 Answers  up vote 20 down vote accepted
share|improve this answer add comment  Thinking about this topic
kept me up last night!  What if you rotate the bar (wouldnt a
sphere be better?) at 50% of c then orbit it in the opposite
direction at 51% of c before finally assuming your own position
to be stationary. The bar then rotates faster than light!:)  I
recently read that existing technology is capable of
accelerating an object up to 99% of light speed over the course
of a 12 month burn, I wondered how the same technology could be
used to spin an object in a laboratory and what kind of speeds
have been recorded doing so.  I considered how a "light
windmill" could be rotated using supercooled magnetic bearings
in a vacuum chamber with the 'sails' being fed by laser
discharge.  I suspected it wouldnt be possib