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| can be a smooth curve or straight line |
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| Allows us to picture or visualize motion |
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| describes the speed and direction of motion |
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| occurs when the speed of an object changes, or its direction of motion changes, or both |
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| acceleration that is opposite to the direction of motion |
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| the change in an object 's velocity (increase or decrease) in a given period of time |
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| rate of change in position for a time interval |
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| the rise of a graph over its run |
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| represented by the slope on a velocity-time graph |
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