1. The problem statement, all variables and given/known data Taking the internal density of the Earth to be uniform, calculate, in terms of the Earth’s radius R, the distance external to the surface of the Earth at which the acceleration due to gravity is equal to that within the Earth at half the Earth’s radius. 2. Relevant equations 3. The attempt at a solution Not sure about this one..Inside the earth surely the bits of mass further out will pull out on an object.. so how do i work this out? Thanks!