Note that the simulation allows you to also display the force of the smaller moon pulling upon the larger planet. Click/tap the button to show the force acting upon the planet. Which force is largest: the force ON the smaller moon or the force ON the larger planet?

The force on the larger planet is largest.

Explanation:

Earth has a greater gravitational pull than the moon simply because the Earth is more massive. The moon's gravitational pull also affects Earth, though; the rising and falling of the tides are an effect of the moon's gravity.

But we must also know that how much gravitational force one object exerts on another is related to the mass of the two objects and the distance between them. An object's gravitational pull affects an object that is close to it more than an object that's farther away.

For instance, Jupiter has a much greater mass than Earth, and therefore has a greater gravitational pull, but because our moon is so much closer to Earth than it is to Jupiter, the Earth's gravitational pull exerts a greater force on the moon than Jupiter does. That's why the moon isn't pulled out of Earth's orbit by the gravity of larger planets or by the sun.