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physics

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A car accelerates at a constant rate from zero to 37.8 m/s in 10 seconds and then slows to 13.5 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds?

  • physics -

    Average acceleration
    = (velocity change)/(time interval)
    = (13.5 m/s)/15 s = 0.9 m/s^2

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