1. The problem statement, all variables and given/known data A spherical shell has inner radius R1, outer radius R2, and mass M, distributed uniformly throughout the shell. The magnitude of the gravitational force exerted on the shell by a point particle of mass m located a distance d from the center, outside the inner radius and inside the outer radius, is 2. Relevant equations F = -GMm/r^2 3. The attempt at a solution I know that from gauss's law that the force from a spherical shell would have the same gravitational force as one from a point particle. How would you find the gravitational force of a particle located between two shells though?