Although the shaft, wheel, and cable move, the force remains nearly vertical relative to the ground.
This is called a cyclic bending stress and the aerial lift above is a good example.
A fraction of the elastic potential energy stored in the cord is typically transferred back to the person, throwing the person upwards some fraction of the distance he or she fell.
Fatigue failure is typically modeled by decomposing cyclic stresses into mean and alternating components.
[1][2] Engineers try to design mechanisms whose parts are subjected to a single type (bending, axial, or torsional) of cyclic stress because this more closely matches experiments used to characterize fatigue failure in different materials.