Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt and Company · leaf 214
n-stitute a sphere with the particle on its surface, and willtherefore attract as if all this portion were concentratedin the centre. To find what this attraction will be, let usfirst suppose the whole sphere of equal density. Let usput «, the radius of the entire sphere. r, the distance P 0 of the… … 196 ASTUONOMT. that is, inside the sphere the attraction will be directly asthe distance of the particle from the centre. If the par-ticle is at the surface we have r = a^ and the attraction is 4 4Outside the surface the whole volume of the sphere -^tt a^ o will attract the particle, and the…
Astronomy
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