Term
|
Definition
| a push or pull on an object |
|
|
Term
|
Definition
| the combination of all of the forces acting on an object; think about a tug-of-war... you have one side pulling and the other side pulling -- two sets of forces on the rope! |
|
|
Term
|
Definition
| when all of the forces acting on an object are perfectly balanced (equal); to get this, you need forces countering each other, with the same strength; these do not produce a change in motion |
|
|
Term
|
Definition
| when the forces acting on an object are not countering each other with the same strength; you get one force that is stronger than the other; these cause a change in motion |
|
|
Term
|
Definition
| the unit we use to measure forces |
|
|
Term
|
Definition
| when an object changes places over time |
|
|
Term
|
Definition
|
|
Term
|
Definition
| how fast and in what direction something moves |
|
|
Term
|
Definition
| any change in velocity; this means you can do this if you change how fast (the speed) or the direction and call it this, because velocity includes both |
|
|
Term
|
Definition
| a force that tries to stop motion, caused by the uneven surfaces of one object or substance rubs against the uneven surface of another object or substance |
|
|
Term
|
Definition
| any material that can flow and that takes the shape of its container; liquids or gases |
|
|
Term
|
Definition
| a kind of friction that happens when air particles hit a moving object; it slows objects moving through air down |
|
|
Term
|
Definition
| the amount of matter that something is made of |
|
|
Term
|
Definition
| a measure of the gravitational force put on an object |
|
|
Term
|
Definition
| a kind of force that causes attraction between two objects; the more massive the objects, the stronger the force will be; the closer together the objects are, the stronger the forces will be |
|
|
