Newton’s Law of Universal Gravitation Gravitational Field Strength Gravitational Field of a Hollow Shell • Inside a hollow sphere, the gravitational field is 0. Outside a hollow sphere, you can treat the sphere as if it’s entire mass was concentrated at the center, and then calculate the gravitational field Gravitational Field Inside a Solid Shell • Outside a solid sphere, treat the sphere as if all the mass is at the center of the sphere. Inside the sphere, treat the sphere as if the mass inside the radius is all at the center. Only the mass inside the
