
What is the definition of gravity?
What does the law of universal gravitation state?
The force of attraction between two objects varies with what two factors?

The acceleration due to gravity on Earth is equal to _______________.
The acceleration due to gravity on Earth is the same on all objects. However, if a bowling ball and a feather are dropped off a tower, the feather will fall slower. Why is this?

What is the definition of mass?
What is the definition of weight?
Weight a force.
Mass is a force.
When an astronaut travels from the Earth to the Moon, which of their physical properties changes: mass or weight? Explain why one property changes but the other does not.