is mass a measure of gravitational force
In very concrete terms, to determine the inertial mass, you apply a force of F Newtons to an object, measure the acceleration in m/s2, and F/a will give you the inertial mass m in kilograms. 2) Gravitational mass. This is defined by the force of gravitation, which states that there is a gravitational force between any pair of objects, which is given by F = G m1 m2/r2 where G is the universal gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between them.