Since the floor is rough, it exerts both a normal force
N1
and a frictional force
f1
on the ladder. However, since the wall is frictionless, it exerts only a normal force
N2
on the ladder. The ladder has a length of
L = 4.7 m,
a weight of
WL = 58.5 N,
and rests against the wall a distance
d = 3.75 m
above the floor. If a person with a mass of
m = 90 kg
is standing on the ladder, determine the following.