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"A cab driver picks up a customer and delivers her 3.31 km away, driving a straight route. The driver accelerates to the speed limit and, upon reaching it, begins to decelerate immediately. The magnitude of the deceleration is 4.70 times the magnitude of the acceleration. Find the lengths of the (a) acceleration and (b) deceleration phases of the trip."

  • physics -

    The driver spends 4.7 times more time accelerating as decelerating. The average speed is half the speed limit during each interval. Therefore he travels 4.7 times farther while accelerating. The accelerating llength travelled is
    (4.7/5.7)*3.31 = ?

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