# Hyperloop : pie in the sky or is it time?

**URL:** <https://boards.straightdope.com/t/hyperloop-pie-in-the-sky-or-is-it-time/666116>\
**Category:** Factual Questions\
**Created:** [August 13, 2013, 6:37am UTC](https://boards.straightdope.com/t/hyperloop-pie-in-the-sky-or-is-it-time/666116 "2013-08-13T06:37:17Z")\
**Posts on this page:** 1\
**Showing post:** 308

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**Author:** ![Stranger\_On\_A\_Train](https://avatars.discourse-cdn.com/v4/letter/s/13edae/32.png) [@Stranger\_On\_A\_Train](https://boards.straightdope.com/u/Stranger_On_A_Train)\
**Post date:** [December 23, 2023, 9:03am UTC](https://boards.straightdope.com/t/hyperloop-pie-in-the-sky-or-is-it-time/666116/308 "2023-12-23T09:03:16Z")

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> [@Sam\_Stone](#):
>
> - Then, I used the formula for speed, s = d/t, where s is speed, d is distance, and t is time. I rearranged it to solve for t: t = s/a, where a is acceleration.
> - Finally, I plugged in the values for s and a: t = 500 mph / 21.94 mph/s = 22.79 s. I rounded this to two decimal places, so t = 22.6 s.

Well, at least it got e methodology mostly correct this time, although it needs some tutelage on applying consistent significant figures and it seems to have a tenuous grasp on the concept of ‘rounding’. I wouldn’t trust it to make toast for me but I’ll upgrade my evaluation from ‘parrot’ to ‘reasonably talented magpie’.

Stranger

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