Curiosity › Science › Physics › Equation for Newton’s universal law of gravitation for radius 0 › Reply To: Equation for Newton’s universal law of gravitation for radius 0
Newton’s gravitational law is applied for point masses only. So when you assume two-point masses overlapping one another, the r is 0. But that’s just the mathematical expression going to infinity. In reality, it is impossible due to Pauli exclusion principle. You cannot have two masses occupying the same position.
For your example, take a look at Shell Theorem.