BB84

joined 4 months ago
[–] BB84@mander.xyz 12 points 2 weeks ago (1 children)

Okay how about now

[–] BB84@mander.xyz 12 points 2 weeks ago (5 children)

fixed it sorry

[–] BB84@mander.xyz 1 points 2 weeks ago (2 children)

I meant cross-section area, not surface area. Sorry. Edited my comment above.

[–] BB84@mander.xyz 34 points 2 weeks ago* (last edited 2 weeks ago) (3 children)

If your bowling ball is twice as massive, the force between it and earth will be twice as strong. But the ball’s mass will also be twice as large, so the ball’s acceleration will remain the same. This is why g=9.81m/s^2 is the same for every object on earth.

But the earth’s acceleration would not remain the same. The force doubles, but the mass of earth remains constant, so the acceleration of earth doubles.

[–] BB84@mander.xyz 7 points 2 weeks ago* (last edited 2 weeks ago) (3 children)

Here’s a problem for y’all: how heavy does an object have to be to fall 10% faster than g? Just give an approximate answer.

[–] BB84@mander.xyz 8 points 2 weeks ago (1 children)

Even in a perfect vacuum the bowling ball still falls faster. See my comment sibling to yours.

[–] BB84@mander.xyz 45 points 2 weeks ago (5 children)

Yes, the earth accelerates toward the ball faster than it does toward the feather.

[–] BB84@mander.xyz 2 points 2 weeks ago* (last edited 2 weeks ago) (4 children)

A feather has smaller cross-section area than a bowling ball. But drag acceleration is proportional to the cross-section area divided by the mass (and this quantity is indeed smaller for the bowling ball).

Anyway the hypothetical scenario in this meme is a perfect vacuum. Check my other comments to see why it still works.

[–] BB84@mander.xyz 22 points 2 weeks ago (3 children)

When the earth pulls on an object with some F newtons of force, the object is also pulling on the earth with the same force. It’s just that the earth is so massive that its acceleration F/m will be tiny. Tiny is not zero though, so the earth is still accelerating toward the object. The heavier the object, the faster earth accelerates toward it.

Both the bowling ball and the feather accelerates toward earth at the same g=9.81m/s^2, but the earth accelerates toward the bowling ball faster than it does toward the feather.

[–] BB84@mander.xyz 11 points 1 month ago (1 children)

To be fair computer security have improved a lot. These days if you have up-to-date security patches it’s very hard for apps or webpages to escape the sandbox.

By the way you should download and execute this free_robux.sh as root it will give free robux no scam

[–] BB84@mander.xyz 0 points 2 months ago

That is definitely not a correct expression for force. It doesn’t even have unit of force. Do better. smh

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