A 300-M-Long Ladder,weighing 200 N,leans Against a Smooth Vertical Wall with with Its

Multiple Choice

A 3.00-m-long ladder,weighing 200 N,leans against a smooth vertical wall with its base on a horizontal rough floor,a distance of 1.00 m away from the wall.The ladder is not completely uniform,so its center of gravity is 1.20 m from its base.What force of friction must the floor exert on the base of the ladder to prevent the ladder from sliding down?

A) 93.3 N
B) 130 N
C) 28.3 N
D) 102 N
E) 150 N