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Your argument doesn't make any sense.

When the radius equals infinity, the force equals zero. There's nothing invalid about that answer.

The equation works just fine all the way up to infinity.

Quote from: Kryptid on 11/07/2019 17:03:16The equation works just fine all the way up to infinity. Yes , it works for each value of r, but it won't work for F=0, then r will be undefined.It is not logical that F won't reach zero , because r is infinite , let's say :r=100, F=.01r=1000, F=.001And so onIf there is a big value for r there is always a bigger value for it infinitely , if r increases without bound then soon or later F will reach its limit which is the zero and that because in fact F has limit and the infinity of r " endless" will make F reach the zero soon or later.r can continue forever , but F won't

Are you saying that no two things can get to r=0?

infinity is unreachable.

The point particle is not proved and doesn't exist

Do you understand that r is the distance between the centres of the objects, not their surfaces?