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Unit 4
Force & Motion
Term | Definition |
---|---|
force | a push or pull, which may cause a change in an object's motion |
gravity | the force of attraction between objects; such as the attraction between Earth and objects on it |
friction | a force that acts between two touching objects and that opposes motion |
balanced forces | forces that cancel each other out, because they are equal in size and opposite in direction |
unbalanced forces | forces that cause a change in an object's motion because they don't cancel each other out |