>>13688585>, i mean on top of the disk at the centre of the circle.that would be infinity gravity always. There is a funny thing about a sphere. When calculating fields from a sphere you can always assume the fields are from a point. Then you try to calculate firelds from other things you will get a something/0 when you evaluate it. My best answers is just assume a point mass at the center of the disc with mass equal to the volume of the disc multiplied by the density of gold. Then you can get a reasonable answer. Otherwise it's a /0 or a very rapidly changing value. In reality this large object would exert significant tidal forces on itself, until the disc transforms into a sphere, ironically.
