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 = 4.50 m,
a weight of
WL = 51.5 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.
(a) the forces exerted on the ladder when the person is halfway up the ladder (Enter the magnitude only.)
N1 = N
N2 = N
f1 = N
(b) the forces exerted on the ladder when the person is three-fourths of the way up the ladder (Enter the magnitude only.)
N1 = N
N2 = N
f1 = N