A 50-M Long,12-Kg Uniform Ladder Rests Against a Smooth Vertical Wall

Multiple Choice

A 5.0-m long,12-kg uniform ladder rests against a smooth vertical wall with the bottom of the ladder from the wall.The coefficient of static friction between the floor and the ladder is 0.28.What distance,measured along the ladder from the bottom,can a person climb before the ladder starts to slip?

A) 4.0 m
B) 3.7 m
C) 1.7 m
D) 1.3 m
E) 3.3 m