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A book of mass m sits at rest on an inclined ramp. The coefficient of static friction between the book and the ramp is Is.
A book of mass m sits at rest on an inclined ramp. The coefficient of static friction between the book and the ramp is Is. If the ramp is tilted to a critical angle of 0c= 47, the book will start to slide down the ramp. The angle A is less that the critical angle of 47, so the book remains at rest. What is the correct expression for the magnitude of the normal force on the book, when 0 < 0c
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