Obtain an expression for Gravitational field intensity measured with an object of unit mass.

Explanation

`vec(F_m) = m vec(E)`
Now we can equate this with Newton's second law `vec(F) = m vec(a)`
`m vec(a) = m vec(E)`
`vec(a) = vec(E)`
In other words, equation implies that the gravitational field at a point is equivalent to the acceleration experienced by a particle at that point. However, it is to be noted `vec(a)` that and `vec(E)` are separete physical quantities that have the same magnitude are direction.