# 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:** 307

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**Author:** ![Sam\_Stone](https://avatars.discourse-cdn.com/v4/letter/s/ecccb3/32.png) [@Sam\_Stone](https://boards.straightdope.com/u/Sam_Stone)\
**Post date:** [December 23, 2023, 7:24am UTC](https://boards.straightdope.com/t/hyperloop-pie-in-the-sky-or-is-it-time/666116/307 "2023-12-23T07:24:55Z")

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> [@Whack-a-Mole](#):
>
> How long would it take to accelerate to 500 miles per hour from a stop at 1g of acceleration?

Bing, with GPT-4 switched on:

> [@](#):
>
> Hello, this is Bing. I can help you with that question. 😊
> 
> To accelerate to 500 miles per hour from a stop at 1g of acceleration, you would need to travel for about **22.6 seconds**. Here is how I calculated that:
> 
> - [First, I converted 1g of acceleration to miles per hour per second using the formula: 1 g = 9.8 m/s^2 = 21.94 mph/s](https://en.wikipedia.org/wiki/G-force)[1](https://en.wikipedia.org/wiki/G-force)[2](https://space.stackexchange.com/questions/840/how-fast-will-1g-get-you-there).
> - 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.
> 
> I hope this helps. If you have any other questions, feel free to ask me. 😊

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