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hello mate✔
see the above attachment...
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We know that:
If two similar solid spheres are in contact, then the distance between the centres of the spheres is equal to the sum of the radius of spheres.
And:
The two spheres, where mass m and radius r in contact.
So:
The distance between centres of spheres:
Now:
According to Newton's gravitational law:
Note: But both the spheres are similar.
So:
Substituting this in the above expression:
Here:
is constant, so let it be K.
So:
Hence:
Force is directly proportional to radius⁴
Anonymous:
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