1. The problem statement, all variables and given/known data A uniform, solid, 1900kg sphere has a radius of 5.00m. Find the gravitational force this sphere exerts on a 1.50kg point mass placed at the following distances from the center of the sphere: (a) 5.01m , and (b) 2.45m. 2. Relevant equations Fg = GMm/r^2 volume of sphere = (4/3)piR^3 density of sphere = M/volume ratio of point mass to shere: M/msphere = (4/3piRM^3)/(4/3piRsphere^3) Mmass = msphere(Rmass/Rsphere)^3 G(M)(mmass)/r^2 = Gmass(msphere(rmass/rsphere)^3)/Rsphere^2 = G(mmass)(msphere)rmass/rsphere 3. The attempt at a solution Fg = G(1900)(1.50)(5.01)/5^2 = 3.8x10^-7 Fg = G(1900)(1.50)/5^2 = 8x10^-8 nothing, I'm not sure what I'm doing wrong, any help is greatly appreciated.