Which statement correctly describes the differences between positive and negative acceleration?
1. Positive acceleration describes a change in speed; negative acceleration describes no change in speed.
2. Positive acceleration describes no change in speed; negative acceleration describes a change in speed.
3. Positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed.
4 Positive acceleration describes a decrease in speed; negative acceleration describes an increase in speed.
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Which statement correctly describes the differences between positive and negative acceleration?
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