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15 September, 23:38

A speed time graph shows that a car moves at 20 m/s for 15s. The car's speed steadily decreases until it comes to a stop at 40s. Which of the following describes the slope of the speed time graph from 15s to 40s

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  1. 15 September, 23:44
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    0s to 15s: constant speed/zero acceleration

    15s to 40s: constant gradient, therefore constant deceleration
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