Along a straight track

PHYSICS · Subjective · CBSE · Physics · Motion in a Straight Line · Motion in a Straight Line

Problem

Along a straight track, rightward is chosen as the positive direction. At an instant a trolley has velocity −4 m/s-4\,\text{m/s} and acceleration −2 m/s2-2\,\text{m/s}^2. Determine whether the speed of the trolley is increasing or decreasing at that instant. Justify your answer using the given signs.

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