A 500-M Long Uniform Ladder Leans Against a Smooth Wall and and Its

Multiple Choice

A 5.00-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 2.30 m from the wall.A person of mass 80.0 kg climbs 2.50 m up the ladder.If the ladder is to remain in place,what frictional force must be exerted by the floor on the ladder?

A) 100 N
B) 150 N
C) 205 N
D) 249 N
E) 300 N