Use the position versus time graph to answer the questions. At which of the following times is the object speeding up? a) 0.5 s b) 1.5 s c) 2.5 s d) more than one of the above times e) none of the above times
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A: mass of box = m = 10 kg co efficient of friction = 0.7 acceleration = a = 6 m/s2
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