Comment on We can't all be astronauts.
gabereal@sopuli.xyz 3 days agoI learned three things in physics:
- You can’t push a rope
B) Cows can be assumed to be spherical
III) Everything exists as a point mass. The Earth is a point mass, electrons are point masses, the aforementioned spherical cows are point masses…
ChaoticNeutralCzech@feddit.org 3 days ago
Spherical objects can be simplified to point masses when calculating gravity. But the center of mass can be outside your body when you bend over and two people can therefore reduce the distance of their centers of masses to 0. However, this will not result in infinite attractive force (that could get Cirque de Soleil performers stuck bent over each other), similarly: pouring a liquid without adhesion or surface tension on a giant donut-shaped object in space would not result in it accumulating in a sphere in the center, the donut would get covered in it.