Question

When Earth pulls on an object, that object also pulls on Earth. The values of these two forces are . This phenomenon can be explained using Newton’s law. We see the object move but not Earth because there’s a difference in their .

Answer 1

When Earth pulls on an object, that object also pulls on Earth. The values of these two forces are [the same]. This phenomenon can be explained using Newton’s [third] law. We see the object move but not Earth because there’s a difference in their [mass].

Step-by-step explanation:

According to Newton’s third law, Earth pulls the object with the same amount of force that the object pulls Earth. The forces act in opposite directions. If there’s a large difference in mass between Earth and the object, the object moves, but Earth doesn’t.

Answer 2

The values of these two forces are equal. Your weight on Earth is equal to the Earth's weight on you. When you and the Earth fall toward each other, your acceleration is greater than the Earth's acceleration, because your mass is less than the Earth's mass.