Unit 3

2. a force that resists the motion of one surface against another
6. the force applied by one object onto another in an interaction
11. change in an object's motion (speed and/or direction); caused by unbalanced forces measured in m/s2
15. a relationship where one variable increases as the other increases
17. the force that responds to an action force in an interaction simultaneously happening at the same time
18. how fast an object is moving, calculated by distance divided by time

1. the total of all forces acting on an object, measured in Newtons (N)
3. the unit used to measure force
4. An object will stay at rest or in motion unless acted upon by a net force (also known as the law of inertia)
5. forces that are equal in size and opposite in direction, canceling each other out and resulting in no motion change
7. a push or pull acting on an object
8. a force that pulls objects toward one another, especially the pull of Earth on objects
9. a measure of the amount of matter in a sample
10. forces that are not equal and opposite, causing a change in an object's motion
12. a relationship where one variable increases as the other decreases
13. the speed of an object in a given direction
14. for every action, there is an equal and opposite reaction
16. force equals mass times acceleration (F = ma); the object accelerates in the direction of the force