Question

Two concentric spherical shells have masses m1 and m2 and radii r1 and r2 (r2 > r1). What is the force

Answer 1

Two concentric spherical shells have masses M1, M2 and radii R1 , R2 (R1<R2. Two concentric spherical shells have masses M1, M2 and radii R1 , R2 (R1<R2). What is the force exerted by this system on a particle of mass m if it is placed at a distance (R1+R2)/2 from the centre?