Chapter 4

2. pair the forces that two objects exert on each other when two objects interact with each other
4. a measure of the gravitational force exerted on an object it’s value can change with the location of the object in the universe
7. is the tendency of an object to resist changes in its motion.
8. diagram used to analyze forces affecting the motion of a single object
10. diagrams diagrams that show force vectors as arrows
12. of friction the ratio of the magnitude of the force of friction between two objects in contact to the magnitude of the normal force which the objects press against each other
14. the force that attracts a body toward the center of the earth
17. is a measure of the inertia of an object.
18. force a force that acts on an object lying on a surface, acting in a direction perpendicular to the surface
19. any object thrown or launched into the air, moving under the influence of gravity alone

1. speed of something in a given direction
3. the change in position of an object
5. the state in which the net force on an object is zero
6. greek capital letter that represents the sum of the quantities that come after it
8. an action exerted on an object that may change the object's state of rest or motion
9. friction the force that opposes the movement of two surfaces that are in contact and are sliding over each other
11. rate at which velocity changes over time
13. force a single force whose external effects in a rigid body are the same as the effects of several actual forces acting on the body *
15. force the force that one object exerts on another in one direction
16. force the force that one object exerts on another in the opposite direction as the action force