Topic 3.2 Vocabulary Review

3. For every action there is an equal and opposite reaction.
7. Statements of fact accepted as 100% true and accurate based on all known lab investigations by many people who get the same results over and over.
8. This type of force occurs when the forces acting on an object are unequal in magnitude and act in opposite directions. A non-zero net force.
9. An upward force that is contrary to gravity.
11. Explanations that are accepted as currently being true because all known evidence supports the claim.
13. A measure of the force of gravity acting on an object. This quantity changes with gravity.
14. Downward movement under the force of gravity only.
16. A push or a pull on an object that changes the state of rest or motion of an object.
18. Natural phenomenon. Fundamental, invisible force of attraction that pulls any two objects with mass or energy toward each other.
19. The maximum, constant speed a freely falling object reaches when the upward force of air resistance (drag) equals the downward force of gravity

1. Combination of all forces acting on an object. Vector quantity.
2. When an object is launched into motion by an initial force that is greater than the force of gravity acting on it.
4. Objects in motion stay in motion, objects at rest stay at rest unless acted upon by an unbalanced force.
5. Two or more opposite forces acting on an object with equal magnitude resulting in a net force of zero.
6. The amount of matter that makes up an object.
10. A circular motion. Combination of 2 directions of motion. The object is always moving forward and in free fall toward earth.
12. The net force acting on an object is directly proportional to its acceleration and inversely proportional to its mass. F = ma
15. The SI (Metric) unit for force.
17. The tendency of an object to resist a change in motion and is directly related to an object’s mass.