Your Friend Applies a Horizontal Force to Your 2

Multiple Choice

Your friend applies a horizontal force to your 2.0-kg physics textbook, holding it stationary against a vertical wall. The static and kinetic friction coefficients between the book and the wall are 0.20 and 0.15, respectively. With what force must your friend push on the book in order for it not to slip down the wall?

A) 39 N
B) 20 N
C) 19.6 N
D) 25 N
E) 98 N