Newton's Laws of Motion

3. Law that states that an object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.
4. The change in position of an object with respect to its surroundings in a given interval of time.
5. The unit mass is measured in.
9. Total force that is measured using the standard metric unit known as the Newton.
12. When unbalanced forces are acting on an object, there is a change in speed and/or ___________.
16. The rate of change of velocity.
17. The gravitational force with which the Earth attracts the masses towards its center.
19. An object's inertia is directly related to the object's _________.
20. Forces that are opposite in direction and equal in size.

1. This is the unit for Force.
2. This force resists motion when the surface of one object comes in contact with the surface of another.
6. This law is also known as Newton's Second Law.
7. This is the vector form of speed.
8. The tendency of a body to resist a change in motion or rest.
10. The rate of change of position of an object in any direction.
11. Heavier objects require more _______ to move.
13. Type of relationship of the mass of an object upon the acceleration of the same object.
14. Law that states F = ma, or net force is equal to mass times acceleration.
15. Force that is applied in one direction that is greater than the force applied in the opposite direction.
18. A force that tells massive objects how to move. Always equal to 9.81 meters per second squared.