1. ____ speed		F. The speed of an object in a particular direction.
2. ____ velocity		I. The rate at which velocity changes both speed and direction.
4. ____ acceleration		B. A force that opposes motion between two surfaces that are in contact.
5. ____ friction		A. An object at rest.
6. ____ inertia		D. Speed that stays the same.
7. ____ displacement		H. The change in position of an object.
8. ____ slope		E. The slant of a line on a graph.
9. ____ momentum		C. The mass of an object times the velocity of the object.
10. ___ constant speed		G. The distance traveled divided by time.