A 50-M Long Uniform Ladder Leans Against a Smooth Wall and and Its

Multiple Choice

A 5.0-m long uniform ladder leans against a smooth wall and its base rests on a rough floor.The ladder has a mass of 18.0 kg and its base is a distance of 2.3 m from the wall.If the ladder is to remain in place,what frictional force must be exerted by the floor on the ladder?

A) 45 N
B) 68 N
C) 73 N
D) 94 N