What minimum horizontal force is required to hold a 3kg book vertically against a wall to prevent it from falling if the coefficient of static friction between the book and the wall is 0.3?
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What minimum horizontal force is required to hold a 3kg book vertically against a wall to prevent it from falling if the coefficient of static friction between the book and the wall is 0.3?
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Answer:
Explanation:
we need to counter by increasing normal force
i.e 0.3 x N = 3g
gives N = 10g = 100
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