Find Acceleration Diagram from Velocity Vector Diagram| University Physics

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The figure above shows the motion diagram for an object. If the x-axis is chosen as shown (positive to the right), which of the diagrams below best represents the corresponding acceleration vs time graph? (In the graph, later time is to the right).

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ANSWER: Graph B

The motion begins with a decreasing negative velocity. This means that the acceleration is positive. Then it changes from a positive acceleration to a negative acceleration. The answer is Graph B.                          

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