| A | B |
|---|
| A force that opposes, or acts against, motion when two surfaces rub against each other. | friction |
| The force of attraction between magnets and magnetic objects | magnetism |
| forces that are not equal | unbalanced forces |
| A push or pull taht causes an object to move, stop, or change direction | force |
| The force that pulls all objects in the universe toward one another | gravitation |
| The forces acting on an object that are equal in size and opposite in direction, | balanced forces |
| The energy of motion, or energy in use | kinetic energy |
| The property of matter that keeps it moving in a straight line or keeps it at rest | inertia |
| The path one body in space takes as it revolves around another body: such as Earth as it revolves around the sun | orbit |
| A measure of how hard it is to slow down or stop an object. | momentum |
| The ability to cause changes in matter | energy |
| law that states that all objects in the universe are attracted to all other objects | law of universal gravitation |
| An object's place, or location | position |
| Something that makes work seem easier by changing the size or the direction of force | machine |
| The result of two or more forces acting together on an object | net force |
| a change in motion caused by unbalanced forces or a change in velocity | acceleration |
| The use of force to move an object through a distance | work |
| An objects speed in a particular direction | velocity |
| A measure of the distance an object moves ina given amount of time | speed |
| The amount of work done for each unit of time | power |
