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A car accelerates at a constant rate from zero to 23.3 m/s in 10 seconds and then slows to 15 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s^2 during the 15 seconds?

  • Physics -

    Since the final velocity after 15 seconds is 15 m/s, the average acceleration is (15m/s)/(15s) = 1 m/s^2

    It's exactly like saying a car moved 23.3m in 10 s, then went back to 15m from its starting point in 5 more seconds. What is the average speed? 1m/s

  • Physics -

    @ Steve. The answer to the question is 0.7m/s^2

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