Remember that the gravitational force between two objects is roughly proportional to: [tex] \frac{(m1)(m2)}{ {r}^{2} } [/tex] Where m1 is the mass of one object and m2 is the mass of the second object. Since r, the distance between objects doesn't change, all that will affect the gravitational force is the change in mass. If both masses are smaller, then the force is also smaller.
