[-] pumpkinseedoil@mander.xyz 6 points 2 hours ago

Calculate the force between the earth and the bowling ball. It'll be G • (m(earth) • m(bowling ball)) / (r = distance between both mass centers)²

Simplify. You're getting g • m(bowling ball).

Now do the same for the feather. Again, the result is g • m(feather).

Both times you end up with an acceleration of g. If you want to put it that way: The force between the earth and the bowling ball is m(bowling ball)/m(feather) times as high as the force between the earth and the feather, but the second mass also is m(bowling ball)/m(feather) times as high, resulting in the same acceleration g.

Higher force on same mass results in stronger acceleration. Same force on higher mass results in lower acceleration. Higher force on equally higher mass results on equally high acceleration.

I just asked my professor this exact thing (if the ball would get to the earth sooner because it accelerates the earth towards it) like two weeks ago and my previous message + this message was his explanation.

PS: If you're looking at this from outside, the ball travels less distance before touching the ground (since the ground is slightly nearer due to pulling the earth more towards it), but also accelerates slower while accelerating the earth faster towards it. The feather gets accelerated faster towards the earth and travels a longer distance before touching the ground but doesn't accelerate the earth as fast towards it.

But because we're not outside, we only care about the total acceleration (of the earth towards the object and the object towards the earth), and that's g. We don't notice if (fictional numbers) the earth travels 1m and the object travels 1m or if the earth stays in place and the object travels 2m, what matters for us is how long it takes an object 2m away from the earth to be 0m away from the earth.

[-] pumpkinseedoil@mander.xyz 21 points 4 hours ago

Why your spoiler is wrong:

The gravitational force between two objects is G(m1 m2)/r²

G = ~6.67 • 10^-11 Nm²/kg²

m1 = Mass of the earth = ~5.972 • 10^24 kg

m2 = Mass of the second object, I'll use M to refer to this from now on

r = ~6378 • 10^3 m

Fg = 6.67 • 10^-11^ Nm²/kg² • 5.972 • 10^24^ kg • M / (6378 • 10^3 m)² = ~9.81 • M N/kg = 9.81 • M m kg / s² / kg = 9.81 • M m/s² = g • M

Since this is the acceleration that works between both masses, it already includes the mass of an iron ball having a stronger gravitational field than that of a feather.

So yes, they are, in fact, taking the same time to fall.

[-] pumpkinseedoil@mander.xyz 9 points 1 day ago

You can write down an infinite amount of numbers without ever leaving [0, 1]

[-] pumpkinseedoil@mander.xyz 7 points 2 days ago* (last edited 2 days ago)

Oh you're saying opposite site and adjacent site in English

Anyway how is the r=1 circle harmful for that?

[-] pumpkinseedoil@mander.xyz 9 points 2 days ago

Please elaborate.

[-] pumpkinseedoil@mander.xyz 6 points 2 days ago

New parties have to get big at local levels first before shooting for the stars

[-] pumpkinseedoil@mander.xyz 71 points 4 days ago

Gorilla gorilla gorilla

To save you some time

[-] pumpkinseedoil@mander.xyz 1 points 4 days ago

But the timeline is:

  1. Prevent worse

  2. After that protest and show the democrats how much you disagree with their stance on that

[-] pumpkinseedoil@mander.xyz 1 points 5 days ago

Saving others some time:

Palestinians’ preference for Harris over Trump stems from the former US president’s policy towards Palestinian issues, such as recognizing Jerusalem as the capital of Israel in 2017 and moving the US embassy from Tel Aviv to Jerusalem the following year. These actions were seen by Palestinians as undermining their aspirations for East Jerusalem as the capital of a future Palestinian state and as a firm endorsement of Israeli sovereignty over the contested city.

In 2019, Trump recognized Israeli settlements in the West Bank as legal, in blatant defiance of international law, and halted US support for the United Nations Relief and Works Agency for Palestine Refugees in the Near East (UNRWA). This action was seen as tacit approval of Israel’s expansion into occupied Palestinian territories.

[-] pumpkinseedoil@mander.xyz 12 points 5 days ago

So you think Trump would be better than Harris? Because that's the only thing you get to vote on: Trump or Harris. A vote for neither is a vote for whoever has more votes - and we know that statistically republicans are less likely to vote third party (or not vote), so it most likely is a vote for Trump.

[-] pumpkinseedoil@mander.xyz 33 points 1 month ago

Kelvin is the SI unit. Anyway also for the weather Celsius is clearer: Below 0 = snow, above 0 = rain. And Celsius at least has fixed points that can be recreated - if all thermometers and data on scales were lost we could easily recreate °C, but not °F.

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pumpkinseedoil

joined 6 months ago