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A car is coasting backwards down a hill at -5.0 m/s when the driver gets the engine started. After 4 seconds, the car is moving uphill at a velocity of +3 m/s. What is the car’s average acceleration?

  • physics - ,

    a = (Vf-Vo)/t = (3-(-5)) / 4 = 2 m/s^2.

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