What is Newton's law of gravitation?
How is gravity related to the other
What is the inverse square law? To what
besides gravity does it apply?
Does the larger Earth exert a larger
gravitational force on the smaller
Moon than it exerts on the Earth?
What causes the tides? Why are there two per day
instead of just one?
How does the force of gravity change with distance
outside the Earth? inside the Earth?
If an object weighs 600 N at the Earth's surface, what
will it weigh twice as far out from the Earth's center?
...three times as far out?
How would you calculate your weight in orbit?