Michael Scott puts a box of laptop batteries into the trunk of his car. Later, he drives around an unbanked (flat) curve that has a radius of 48 m. The speed of the car on the curve is 16 m/s, but the box does not slide around. Determine the minimum coefficient of static friction for the box on the floor of the trunk. a) This cannot be determined without knowing the mass of the box. b) 0.17 c) 0.54 d) 0.33 e) 0.42

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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!