1. Why is the moon’s gravity weaker than Earth’s gravity?


2. What two factors affect the force of gravity between two objects?


3. If the distance of two objects decreases, would the force of gravity increase or decrease?



4. Consider the law of gravitational attraction. Two spheres with a mass, M, are attracted to each other by a force, F. If the distance between the two spheres doubles while the masses remain constant, will the force between the two spheres change? If yes, how?