A 100-N Uniform Ladder,8 $\degree$ B)51 $\degree$ C)18 $\degree$ D)42 $\degree$

Multiple Choice

A 100-N uniform ladder,8.0 m long,rests against a smooth vertical wall.The coefficient of static friction between ladder and floor is 0.40.What minimum angle can the ladder make with the floor before it slips?

A) 22 $\degree$
B) 51 $\degree$
C) 18 $\degree$
D) 42 $\degree$