Those men are just very good friends.
I’m appalled at the amount of people in this comments section who failed elementary grade school level of physics and also somehow failed to notice this is the shitpost community
Acceleration vs. Velocity
Not quite. When you’re rotating, you are constantly accelerating in a tangent direction to the diameter. So the poster is right that we should be feeling a force shooting us away from the center of earth.
Except the force of gravity cancels out the centripetal force and then some.
So [force of gravity] - [centripetal force of Earth’s rotation] = 9.8m/s^2
The difference is about 0.5%. A mass weighing 100kg at the north pole would only weigh 99.5kg at the equator. Most of the difference is the centerfugal force of the earth’s rotation.
I’ve not checked the numbers, but apparently it’s detectable in Olympic sports. More height records get broken at equatorial latitudes that higher ones.
A mass weighing 100kg at the north pole would only weigh 99.5kg at the equator
That assumes a perfectly spherical earth. The earth is not perfectly spherical.
The fact that your units are units of acceleration proves the guys point, no?
It sounded like the guy meant the 1700km/h is a velocity, not an acceleration, which is why we don’t feel the force of acceleration.
I was pointing out that spinning is acceleration, just in this case we can’t feel it due to other forces.
Only on the equator, the force is just tiny, it produces major weather systems through the coriolis effect but only on giant scales. This would be like saying people get dizzy if they stand near the pole.
The actual amount of centrifugal force is also tiny. Sure, it’s a relatively fast linear speed compared to something like a merry-go-round, but a merry-go-round’s angular velocity is much higher, and that’s the one you use when calculating the force trying to fling you off.
Also, centripetal force is the inward force observed by an external non-rotating reference frame which deflects motion into a curve. You’ve conflated it with centrifugal force, which is the outward “fictitious” force experienced in a rotating reference frame.
What are those pre-math numbers though? How screwed would we be if rotation doubled or stopped (regardless of the virtual impossibility)?
Have you seen the elementary school experiment where you spin an egg on a flat surface, then you stop the egg and let it go and the then the egg starts spinning again?
If the earth suddenly stopped spinning, the atmosphere would still be spinning at 1700km/h.
A cat 5 hurricane has wind speeds of 253km/h. So we’d be boned.
Look up xkcd world stop spinning
If you want to just pick the fastest velocity we can measure and we’re currently moving at thanks to dark energy the Milky Way galaxy is moving away from other distant galaxies faster than the speed of light.
I think I feel it
I thought so too but it ended up just being an encumbrance of vapors
Man, it’d be so funny if the entire atmosphere just straight up locked in place. Heck, forget rotation, have it keep it’s X/Y/Z in the universe static and just straight up disappear as our solar system moves on.
static
Relative to what?
The center of the universe, I suppose. How fast is the Milky Way moving away from the center? I imagine quite fast.
There is no center, and there’s no fixed grid. It’s still funny to think of the atmosphere stopping from the sun’s reference frame, though.
Well at the very least, we’re supposedly moving 2.1million km per hour along with the Milky Way, and 720,000 km per hour within the Milky Way (so it could be more or less if that’s with Milkys movement or not), plus our own movement around our sun, so … basically really fast.
My point is, having anything just freeze like a glitch would probably cause something terrible. Granted even relative to the sun is probably catastrophic so it’s kind of a moot point, haha.
Ik this is a joke but if anyone is wondering it’s because units of linear motion (km/h, mph, etc.) do not accurately describe rotation. Rotational units like rpm are much better as linear units give a misleadingly large (though technically correct) number.
If anyone is wondering it’s actually because of frame of reference. The first two images have speeds in relation to the rotation of earth, the last imagine uses a different frame of reference. If you put the last image in the same frame of reference as the first two images the number there would be 0km/h, because it would be moving in relation to itself.
It’s actually because the thing that makes you make those faces is the acceleration, not the speed.
All three reference frames shown are accelerated, non inertial frames. But the first two have “fictitious” centrifugal accelerations somewhere around 0.5-2.5 g. The third frame has a detectable centrifugal acceleration, but it’s like 0.003 g or something, and can be lumped in with gravity for many types of problems.
That’s cause earth isn’t actually rotating at all. The entire universe rotates around earth.
velocity V acceleration.
Wait, so if I drive fast enough I get a nice picnic meal?!?!
Space doesn’t have air dummy
But earth is in space and I am ALMOST certain earth has air around it!
The earth isn’t rotating and shaped like a pyramid
You see, that is another perfect example for why earth has to be flat, anything else just isn’t logical!
Fucking thank you! I was furiously skimming to see if anyone knew! It’s totes obvs that the ice walls block the wind, duh doi.
Uh, is this supposed to be a humorous jab at flat earthers, or do you actually think that this doesn’t add up and out yourself as a flat eather and in this case do you wish an explanation?
Maybe I should’ve put this in lemmyshitpost because I didn’t expect anyone to think it was serious.
I have very sensitive antennae when it comes to flat earth bullshit and also started to develop an allergy to non-science. So I beg your pardon that I asked…
Well you aren’t the only one, so maybe I should have laid the sarcasm on more clearly. I thought most people would read the title as tongue-in-cheek.
Sorry captain, but I’ve heard a lot of Flat Earthers that use that exact phrase and act like its a gotcha that the Earth supposedly moves with 1675 km/h (it doesn’t, it rotates at a 15 degrees per hour drift Thanks bob) can’t be felt.
Wow, I’m surprised they even try to explain it mathematically at all. Like, if you’re going to believe something crazy, numbers clearly aren’t going to make or break your conviction.
Oh yeah, they use loony toons maths to explain certain aspect of reality while a globe earth would explain it all at the same time.
🎵Hello Poe’s law, my old friend…🎶
Unfortunately it does add up :(
I was about to say gravity is stronger but it has already been said.
