Challenge: superluminal average speed

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SUMMARY

The discussion confirms that achieving superluminal average speed is theoretically possible, allowing one to reach Andromeda within a human lifetime. However, it emphasizes that in an accelerated frame, distances cannot be simply added due to the non-additive nature of spacetime measurements. Specifically, the distance Da covered by observer B in their proper time Tb can exceed the speed of light (c), but this involves a complex interplay of data from different observers and frames.

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emcy
או עם 'גי

או עם 'גי
 
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This is good one! I like it.

So for practical purposes an answer to your question is YES, in can achive a superluminal average speed and reach Andromeda in your lifetime.

But strictly speaking, in an accelerated frame can not simply add distances measured when you were moving at different speed. So distance becomes non-additive. Hence you can not just divide the total distance by time.

To clarify, asking about the distance Da (in a rest frame of observer A) covered by observer B in his proper time Tb, then Da/Tb can be >> c, but as you see it is a clear mixture of data from different observers and frames.
 

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