What would happen if you had a lightyear long stick, and you pushed it. Would the other end move as you pushed it, or would it take a year?
In: Physics
It would take much longer than a year. The impulse of pushing on the stick will travel at the speed of sound within the stick, which is probably around 4000 meters per second. So it would take about 74,950 years for the other end of the stick to move.
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