Unit 3

3. forces that are equal in size and opposite in direction, canceling each other out and resulting in no motion change
5. the unit used to measure force
10. a relationship where one variable increases as the other increases
12. a push or pull acting on an object
13. happening at the same time
14. change in an object's motion (speed and/or direction); caused by unbalanced forces measured in m/s2
15. the total of all forces acting on an object, measured in Newtons (N)
16. force equals mass times acceleration (F = ma); the object accelerates in the direction of the force
18. a force that pulls objects toward one another, especially the pull of Earth on objects

1. for every action, there is an equal and opposite reaction
2. forces that are not equal and opposite, causing a change in an object's motion
4. the force that responds to an action force in an interaction
6. An object will stay at rest or in motion unless acted upon by a net force (also known as the law of inertia)
7. a relationship where one variable increases as the other decreases
8. the force applied by one object onto another in an interaction
9. a force that resists the motion of one surface against another
11. the speed of an object in a given direction
13. how fast an object is moving, calculated by distance divided by time
17. a measure of the amount of matter in a sample