what's a heavier? A kilogram of steel or a kilogram of feathers

[SeventhSandwich]

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since when the forget is that how you calculate something's weight (G)?

it's... it's G = m * g. g is constant on the location, generally 9.81 N/kg. m is the same because we've already established that. so the G's are also the same?

He's factoring in bouyant forces.

Essentially, the atmosphere exerts an upward force on objects proportional to how much air they displace. This is what makes balloons and airships work.

If you want to take smart-assery to a whole 'nother level, the net gravitational force on the steel is actually higher because a higher percentage of the mass is closer to the Earth's center. Remember that F_g = (g*M₁*M₂)/(r²). Assuming they're both sitting on a level surface, the distance between the steel's center of mass and the Earth (r) is smaller than the distance between the feathers' center of mass and the Earth, meaning that the net gravitational force on the steel is ever so slightly bigger.

[Ad Bot]

[BlocklandBlockoCity]

both are heavy

[Clownfish]

what about in a vacuum

[Refticus]

[shitlord]

late

[Frequency]

a kilogram of math is heavier

[Conan]

what about in a vacuum

the smart-assery position seventh described where more of the mass is closer to center of the earth => slightly heavier still applies. steel is more dense than feathers so even in a vaccum more of the steel mass will be closer assuming the bottom of each pile/group/bag/whatever is at the same distance from the center of the earth and the feathers are optimally packed but not compressed or something.

vacuum only nullifies the buoyant force of air.

in either case the weight difference is negligible unless you're using equipment that's calibrated to measure gravitational field changes or something