Each of the three graphs represents acceleration versus time for an object that already has a positive velocity at time `t_1`. Which graphs show an object whose speed is increasing for the entire time interval between `t_1 and t_2` ? A. graph `I`, onlyB. graphs `I and II`, onlyC. graphs `I and III`, onlyD. graphs `I, II and III`.

Each of the three graphs represents acceleration versus time for an ob

1.	Each of the three graphs represents acceleration versus time for an object that already has a positive velocity at time `t_1`. Which graphs show an object whose speed is increasing for the entire time interval between `t_1 and t_2` ? A. graph `I`, onlyB. graphs `I and II`, onlyC. graphs `I and III`, onlyD. graphs `I, II and III`.
Answer» Correct Answer - D Acceleration is positive in all three graphs, so velocity increases in all three.

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