Newton's Laws Vocabulary

3. An invisible force that pulls objects toward each other.
6. The quantity of matter within a given object.
7. The rate at which velocity changes with time, in terms of both speed and direction.
9. The force that is exerted by one object on one or more other objects.
10. The scientific study of the deformation of the rocks that make up the Earth's crust and the forces that produce such deformation
11. The push or pull on an object with mass causes it to change its velocity.
12. The natural tendency of objects in motion to stay in motion and objects at rest to stay at rest, unless a force causes the velocity to change.
13. A vector quantity: it has both magnitude and direction.
15. Forces that are not equal in magnitude and may or may not act in the same direction.

1. A measurement of speed in a certain direction of motion.
2. Forces where the effect of one force is cancelled out by another.
4. The force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
5. The sum of all forces acting on an object in a single plane.
8. The SI unit of force. It is equal to the force that would give a mass of one kilogram.
14. The state of being stretched tight.