GRED: Twirling pole paradox
Posted: Wed Jun 02, 2010 3:18 pm
Guess the Result of the Experiment of the Day (GRED): The Twirling Pole Paradox
You hold a really long pole -- for example one light year long. You are out in space. You hold one end of this pole firmly to your stomach with the pole pointing out, and then you spin around in a circle. Therefore the free end of the pole makes a complete circle, with you at the center of the circle. Say it takes you 10 seconds to do this. Does the speed of the free end go faster than the speed of light?
Please do NOT post any answers or comments with spoilers here. Answers and comments with spoilers are encouraged in GRED Answer post here: http://asterisk.apod.com/vie ... 30&t=19643 . Please check back there later -- what I believe to be the correct answer will be posted there a few days after this initial post.
Comments or questions here -- without spoilers -- are OK. In particular, questions about the experimental setup are OK.
You hold a really long pole -- for example one light year long. You are out in space. You hold one end of this pole firmly to your stomach with the pole pointing out, and then you spin around in a circle. Therefore the free end of the pole makes a complete circle, with you at the center of the circle. Say it takes you 10 seconds to do this. Does the speed of the free end go faster than the speed of light?
Please do NOT post any answers or comments with spoilers here. Answers and comments with spoilers are encouraged in GRED Answer post here: http://asterisk.apod.com/vie ... 30&t=19643 . Please check back there later -- what I believe to be the correct answer will be posted there a few days after this initial post.
Comments or questions here -- without spoilers -- are OK. In particular, questions about the experimental setup are OK.