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Physics

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A car is traveling along a straight road at a velocity of +36.0 m/s when its engine cuts out. For the next ten seconds, the car slows down, and its average acceleration is 1. For the next five seconds, the car slows down further, and its average acceleration is 2. The velocity of the car at the end of the fifteen-second period is +21.5 m/s. The ratio of the average acceleration values is 1/2 = 1.75. Find the velocity of the car at the end of the initial ten-second interval

If the car is slowing down, the acceleration would be negative. Your statement 1/2 = 1.75 also does not make sense. Please make sure you are stating the problem correctly.

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