Gravity and Motion Puzzle

1. force that attracts a body toward the center of the earth, or toward any other physical body having mass.
4. force that resists or slows down the movement of two objects sliding against each other.
6. Various forms of power present in the universe.
9. The average location of an object's weight, acting as a balance point.
10. measure of how fast an object moves.
11. When gravity is pulling it down and no other forces are acting up on it
17. The acceleration of an object depends on its mass and the amount of net force applied to it.
18. curved, circular, motion of a repeating path around an object in space.
19. rate at which an object changes its velocity over time.
20. higher mass means an object is harder to speed up, slow down, or change direction.

2. rate of change of an object's position, defined as its speed in an specific direction.
3. total length of space between two points, objects, or locations.
5. Every action in nature, there is an equal and opposite reaction.
7. measure of the force of gravity pulling down on an object
8. push or pull acting upon an object, resulting from its interaction with another object.
12. thick, protective layer of gases held closely to the Earth by gravity.
13. unchanging property of matter representing an object's inertia
14. "Quantity of Motion"
15. An object at rest, stays at rest, unless acted upon by an unbalanced force.
16. action or process of moving or being moved.