die_kuestenwache t1_j2t0rp6 wrote
Reply to comment by SW_Zwom in If an object is placed at the end of of a VERY long bar that is connected to an axel, Could rotating the bar close to the axel make the object at the other move extremely fast (like light speed)? by Swade060504
In principle, yes. Infinite rigidity would mean infinite speed of sound. As soon as the velocity of any part of the rod approaches the speed of light, the torque necessry to further accelerate the rod would go towards infinity. However, as others have pointed out, infinite rigidity violates relativity as the speed of sound itself cannot exceed the speed of light.
Viewing a single comment thread. View all comments