Acceleration = 1.1583 m/s^2 Mass of cart = 512.2 g Mass of hanging object = 250 g What is the coefficient of kinetic friction between the upside down cart and the track

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!