I was thinking about Newton's law of gravity: F = Gm1m2/r^2. with this law we can see that the acceleration of on object in earth is (G*mass of the earth) which is 9.8N. what happens if we cosider in our equation abody which his mass is equvalnce to the mass of the earth? each object will give the other an acceleration of 9.8N, does it mean's that the total acceleration would be 19.6N? does that mean's that we attract the earth as well in a fixed acceleration???