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Geoff 馃彺鬆仹鬆仮鬆伋鬆仯鬆伌鬆伩
Geoff 馃彺鬆仹鬆仮鬆伋鬆仯鬆伌鬆伩
@_thegeoff@mastodon.social  路  activity timestamp 3 days ago

Question on #physics, specifically Einstein's equivalence principle that you can't tell if you're in a 1g gravitational field or undergoing 1g acceleration in a rocket or similar:

1: Most rocket accelerations etc are linear. Hold your arms out and drop two coins, they land *directly* "beneath" your hands.

2: You can't have a perfectly linear gravitational field, as far as I know? Drop two coins on Earth, they both land *slightly* closer to your feet because it's a radial field.

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Fish Id Wardrobe
Fish Id Wardrobe
@fishidwardrobe@mastodon.me.uk replied  路  activity timestamp 3 days ago

@_thegeoff how tall do you have to be before (2) is measurable?

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Marc
Marc
@corpsmoderne@mamot.fr replied  路  activity timestamp 3 days ago

@fishidwardrobe @_thegeoff if I remember correctly, the towers of some of the largest bridges on earth have a significant difference of distance between the top and the base, so an actual experiment is not out of reach.

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