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ShesOver9k OP t1_iugx80s wrote

Reply to comment by FlyJunior172 in ELI5: if Earth rotates so fast, why does it always look still from outer space? by ShesOver9k

>vᵣ=rω where v is the linear speed, r is the radius of rotation and ω is the angular speed.

>For earth, r = 3950 mi, and ω = 15°/h. This gives vᵣ= 3950×15×π÷180=1034.107666 mi/h (π÷180 is just a unit conversion) at the equator. Sound familiar?

That is not explaining like I'm 5 lol, but actually a really good answer, ty.

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FlyJunior172 t1_iugy3pt wrote

I wish there were a simpler way to explain where the big number comes from, but unfortunately there isn’t.

All the other methods I’ve learned for dealing with spinning things involve far more complicated math - usually matrices and reference frame conversions. This would be more of an ELI20, where v=rω is more like ELI8.

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