Something's not adding up

Wow am I on facebook?
- Yes, now out with your deeply ingrained racist ideologies or I'm gonna sic gran on you.
- Yes

I know this is a joke but if anyone is wondering it's because they build those things to go towards the air, otherwise they would be going away from the air and it would be hard to breath. Earth is going away from the air too but luckily it has trees attached to itself that make more air and leave it behind, that's where wind comes from.
- Who are you, who are you so wise in the ways of science?
  
  A duck!
- Calvin's Dad over here.
- i'm taking a meteorology class and can confirm that this is how wind works.
- Duh
- Im sure going against the force of gravity vs gravity pull to the earth has a lot to do with it too.

1675 + 10km/h
1675 + 100km/h
1675km/h
Turns out that 1675km/h is the magic number, anything above that is dangerous
- I'm a leading scientist on speed, and this is the answer.
  
  They let scientists do drugs?
  
  Well maybe we should just turn the roller coasters around and go the other direction.
- I remember learning that before the invention of the locomotive, people thought that 30mph was some kind of barrier that the human body could not survive.
- What the speed that earth travel around the sun? And the speed that our solar system rotate in milk way, and milk way speed around the universe? We need the exactly number
  
  I want a button that upon pressing immediately makes me stop moving relative to the universe moving around me. Just suddenly all the momentum to none of it.
- Does that mean that cars bend the space around them instead of moving and the speed numbers on them are fake?

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.
  
  The fact that your units are units of acceleration proves the guys point, no?
  
  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.
  
  What are those pre-math numbers though? How screwed would we be if rotation doubled or stopped (regardless of the virtual impossibility)?
  
  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.

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
- It's not...

Those men are just very good friends.

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

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.
- Xkcd kinda did a video on it except the earth is the one that stopped. It's pretty much exactly the same result though
  https://m.youtube.com/watch?v=gp5G1QG6cXc
  
  It's exactly the same result! Because it's the same scenario from different perspectives.
- 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.

Maybe my math is wrong but: The Earth's radius is about 6,371 kilometers. With this large radius and a 24-hour rotation period, the centripetal acceleration at the equator is only about 0.034 m/s². This is tiny compared to Earth's gravitational acceleration of 9.8 m/s². So the centripetal effect is only about 0.3% of gravity's effect.
- 40,075,000m circumference / 86,400s = 463m/s?
  
  Yes, that is the speed you're going, then the acceleration you experience due to the change in direction as the earths surface revolves about an axis is a = v²/r. R being the radius of the earth. This gets us our small acceleration value.
  You do experience this small acceleration as a very small reduction in weight. You actually weigh more at the poles than the equator. You don't feel the velocity at all, as the whole planet is moving with you.

That's cause earth isn't actually rotating at all. The entire universe rotates around earth.

CHECKMATE ATHEISTS!!!

Wait, so if I drive fast enough I get a nice picnic meal?!?!
- Maybe, if there are nice picnic meals in Heaven.

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.

velocity V acceleration.

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...
  
  I thought everywhere was lemmyshitpost.
  
  Any intelligent joke requires a disclaimer because of flat earthers, Qanoners and conservatives.
- 🎵Hello Poe's law, my old friend...🎶

The earth isn't rotating and shaped like a pyramid
- It's not spinning AND shaped like a pyramid?
  ...where does the turtle go?
- If it's not rotating, why is it shaped like a pyramid?
  Checkmate atheist

Space doesn't have air dummy
- But earth is in space and I am ALMOST certain earth has air around it!

Unfortunately it does add up :(

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.