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Cake day: June 18th, 2023

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  • mkwt@lemmy.worldtoScience Memes@mander.xyzYEET
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    5 days ago

    And for reference, the earth escape velocity from the surface is 11.2 km/s or 25,000 mph, not 7,000 mph.

    To escape the solar system from the earth surface, the minimum speed is 16.6 km/s, or 37,100 mph. But this assumes that you launch in the correct direction to take the most advantage of the Earth’s 30 km/s. If you launch in the most disadvantageous direction, you can add another 60 km/s to escape.















  • mkwt@lemmy.worldtomemes@lemmy.worldSomething's not adding up
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    18 days ago

    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.