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OpenStudy (anonymous):
a book with a mass of 2.5 kg is held in equilibrium on a board with a slope of 50 degrees by a horizontal force. What is the normal force exerted by the book?
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OpenStudy (anonymous):
In order to solve this problem, you need to solve for the magnitude of the gravitational force acting perpendicular to the surface of the board. Since the book is not accelerating into the actual board, the normal force exerted by the board on the book must be equal to this component of gravity.
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