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NASA needs your smartphone during April's solar eclipse (www.popsci.com)

submitted 8 months ago by return2ozma@lemmy.world to c/technology@lemmy.world

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[–] victorz@lemmy.world 23 points 8 months ago (5 children)

A rotating spheroid will oblate when its centrifugal force generates enough inertia to slightly flatten it out into a more irregular, elliptical shape.

I didn't know inertia could be generated. I thought mass just had inertia. Could someone explain? Are they talking out of their ass or is that statement actually accurate?

[–] prashanthvsdvn@lemmy.world 5 points 8 months ago

They are talking about Moment of Inertia. Inertia wrt to rotation changes with how they are positioned in reference to the spinning axis. Think slender bodies are easier to rotate compared to wider bodies with same mass. That’s what they mean when earth slightly flattens out its becoming less slender and more difficult to rotate

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