Message from @hgb
Discord ID: 675490736375857164
I put an object next to it
Do you think the object will be attracted to the ruler or its centre
Aka.
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First of all. The centre of mass definitely is affected by shape just look at the toys that use this effect as a gimmick
Well duh
The centre
But I'm saying
like ive been saying
You don't use centre of mass to calculate gravity when your object is not a point mass.
Which is obvious
what do you mean?
You can only use centre of mass to estimate gravity when the object is like a point mass
> Perform an experiment. Have a large plane perpendicular to the earth, place an object near it, see where the gravitational force acts on that object.
@hgb Is this plane got more mass then the earth. If so the earth will be attracted to the plane. Also this plane woult crumple in on its centre of mass to create a sphere
Near the dead centre of the earth, the prediction of the centre of mass gravity would be very very very large, in reality, it's close to zero.
Ok you're still not getting my point.
The centre of gravity isnt used to calculate the centre of mass ever. It shows where gravity will be in effect
Lmao
Okay.
You're at 5 meters away from centre of the earth
ok
Would it be larger than or smaller than g
larger
following inverse gravitational square law
That's what the centre of mass method predicts, right?
no?
i just told you
But in reality, if you're there, obviously, your gravity would be less than g
the inverse gravitational law
thats not true
Okay.
Think about it.
You're at the centre of the earth. Inverse square law predicts near infinite force there, correct?
no
Well say 0.0000001 m away from centre of earth
ok
You would have a humongously large force
But
You have equal mass in any direction from you.
See what I mean?
The centre of mass model is good if, well, we consider masses to be point masses.