Question

A book of mass 150g is pushed against a vertical wall with a horizontal force of _F_ N. If the coefficient of friction between the book and the wall is 0.15, the minimum value of _F_ required to hold the book in place is
A. 10N
B. 100N
C. 1000N
D. 1500N

Answer 1

Answer:

Mg = uN

N = Normal Reaction = Force

N = Mg/u

N = 1.5/.15

N = 10N

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