Two asteroids sit alone in empty space. Their masses are 17,300 kg and 22,200 kg. They are separated by 42 m. What is the gravitational attraction between them?

Why does the equilibrium position of the spring change when a mass is added to the spring? will the mass oscillate around the new equilibrium position of the spring or the previous position without a mass attached to the spring? if the equilibrium position of the spring changes by 20 cm (assuming no initial mass) when a mass is added to the spring with constant 4.9 kg/s^2, what is the mass of the object attached to the spring?