| Acceleration |
an object in motion that has a changing velocity |
| Action force |
a force exerted on an object |
| Force |
any influence that has a tendency to change an object’s motion |
| Interaction |
a mutual action between objects where each object exerts an equal and opposite force on the other |
| Law |
"A statement that summarizes the results observed in an experiment that is repeated many times by many different scientists. A scientific law is widely accepted as true or as a fact." (eo.ucar.edu/webweather/glossary.html) |
| Newton's 3rd Law |
forces between two contacting bodies must be equal and opposite |
| Mass |
The quantity of substance in an object |
| Motion |
movement: a natural event that involves a change in the position or location of something |
| Reaction force |
the force that is equal in strength and opposite in direction to the action force, which acts simultaneously on whatever is exerting the action force |
| velocity |
speed in a given direction |
| weight |
The gravitational pull on a mass |