A box is placed on top of a 30-degree inclined plane that has 0.10 as its coefficient of static friction. What is the mass of the box if a horizontal force of 90 pound is applied to the box to prevent it from sliding downward? Assume that the horizontal force is parallel to the inclination.

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Author:Katz, Debora M.
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Chapter5: Newton's Laws Of Motion
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A box is placed on top of a 30-degree inclined plane that has 0.10 as its coefficient of static friction. What is the mass of the box if a horizontal force of 90 pound is applied to the box to prevent it from sliding downward? Assume that the horizontal force is parallel to the inclination.

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