Module 22: Clocks in Motion: Examples—Problem 3
Imagine you have two bicycle wheels whose hubs are welded to the ends of a metal shaft with rest length $L_0$. Assume the shaft is aligned along the $x$-coordinate axis. A red dot is painted at one location on the left wheel and a blue dot is painted at the corresponding location on the right wheel. As the shaft spins in the laboratory with angular velocity $\omega$, the red and blue dots are aligned with each other according to an observer at rest. Now imagine that your friend zips by the laboratory headed in the positive $x$-direction at a speed $v$.
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From your friend's perspective, the red and blue dots will not align with each other. Will your friend say that the red dot trails the blue or that the blue dot trails the red?CorrectIncorrect
From your friend's perspective, what is the angular offset between the red and blue dots?CorrectIncorrect