Hysteresis is related to the energy dissipated as heat in a
material in one cycle of contraction and extension.
Hysteresis occurs in rubber balls when the ball is dropped
onto the floor because rubber does not obey Hooke’s Law
perfectly. This can be seen by a hysteresis loop as shown in
Figure 1. The area under the blue line represents the
energy used to compress the ball while the area under the
red line represents expansion after contact with the floor.
The energy needed to compress the ball is greater than
energy released during expansion. The energy lost is
dissipated as heat, represented by the area of the hysteresis
loop.[3]