A car travels at a steady 30.9 m/s around a horizontal (unbanked) curve of radius 200 m. What minimum coefficient of static friction between the road and the car's tires is required to safely navigate the curve? μs = 4 Record your numerical answer below, assuming three significant figures.

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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!