The electric field was defined as e⃗ =f⃗ onq/q, and we used this to find the electric field of a point charge. using analogous reasoning, what is the gravitational field g⃗ of a point mass? write your answer using the unit vector r^, but be careful with signs; the gravitational force between two "like masses" is attractive, not repulsive. express your answer in terms of the variables g, m, r, and r^.