A uniform ladder 5.0 meter long rests against a frictionless, vertical wall with its lower end 3.0 meter from the wall. The ladder weighs 160 Newton. The coefficient of static friction between the ground and the foot of the ladder is 0.40. A man weighing 710 N climbs slowly up the ladder.
(a) Find the maximum frictional force that the ground can exert on the ladder at its lower end?
N
(b) Find the actual frictional force when the man has climbed1.0 meter along the ladder?
N
(c) Find how far along the ladder can the man climb before the ladder starts to slip?
m