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Grade 5 F-2 Sci. Def
Chapter 2 Motion
Term | Definition |
---|---|
position | An object's place |
speed | A measure of the distance an object moves in a given amount of time |
velocity | An object's speed in a particular direction |
acceleration | A change in motion caused by unbalanced forces or a change in velocity |
momentum | A measure of how hard it is to slow down or stop an object |
inertia | The property of matter that keeps it moving in a straight line or keeps it at rest |
action force | The first force in the third law of motion |
reaction force | The force that pushes or pulls back in the third law of motion |
orbit | The path one body in space takes as it revolves around another body; such as Earth as it revolves around the sun |
law of universal gravitation | Law that states that all objects in the universe are attracted to all other objects |