• whotookkarl@lemmy.world
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    5 hours ago

    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.

  • taiyang@lemmy.world
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    7 hours ago

    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.

    • Idreamofcheesy@lemmy.world
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      7 hours ago

      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

      • cynar@lemmy.world
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        6 hours ago

        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.

        • tweeks@feddit.nl
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          5 hours ago

          Interesting, would the muscles of someone living far away from the equator be stronger in general than compared to someone with the same genes / lifestyle on the equator?

        • Idreamofcheesy@lemmy.world
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          7 hours ago

          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.

  • superkret@feddit.org
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    8 hours ago

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

  • peanuts4life@lemmy.blahaj.zone
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    8 hours ago

    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.

      • peanuts4life@lemmy.blahaj.zone
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        6 hours ago

        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.

  • datendefekt
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    8 hours ago

    You see, that is another perfect example for why earth has to be flat, anything else just isn’t logical!