Assertion: solid sphere | /r/CapableOf | act on particle
Facets:
value: outside
type: LOCATION
Source sentences:
text: It forms the first part of his proof that the gravitational force of a solid sphere acting on a particle outside it is inversely proportional to the square of its distance from the centre of the sphere, provided the density at any point inside the sphere is a function only of its distance from the centre of the sphere.