Physical Science

2. friction: Occurs between fluid layers that are moving relative to each other.
7. quantities: A vector quantity has both magnitude and direction.
8. of reference: In dynamics, a system of graduated lines symbolically attached to a body that serve to describe the position of points relative to the body.
9. friction: the resistance created by any two objects when sliding against each other.
11. state of a body that moves freely in any manner in the presence of gravity.
13. is the process where the velocity changes.
16. measures the length between objects or points without regard for direction.
17. friction: The force resisting the motion of a rolling body on a surface.
20. friction: A force between two surfaces that prevents those surfaces from sliding or slipping across each other.
21. Is a measurement of mass in motion, how much mass is in how much motion.

1. the force between two surfaces that prevents those surfaces from sliding or slipping across each other.
3. Is defined to be the change in position divided by the time of travel.
4. force: Pulls objects with mass towards each other
5. point: is a place or object used for comparison to determine if something is in motion
6. Is a vector, this means that it has direction and magnitude and is represented visually as an arrow that points the initial position to the final position.
10. is the gravitational force with which the Earth attracts the masses towards its center.
12. is a push or pull on a mass that can change the objects motion.
14. Three Laws of Motion: three statements describing the relationship between the forces acting on a body and the motion of the body, first formulated by English physicist and mathematician Isaac Newton, which are the foundations of classical mechanics.
15. is the change with time of the position or orientation of a body.
18. force: is the sum of all the forces acting on an object.
19. quantities: A scalar quantity has only magnitude.
20. is distance divided by time interval for the distance traveled.
22. is a quantitative measure of inertia, a fundamental property of all matter.