Hooke`s law describes the elastic behaviour of components where deformation is proportional to the load acting upon them. This behaviour is typical for metals under light loads. SMT-SM-17 demonstrates the application of Hooke`s law and shows the deformation of tension springs under load. For this purpose, a spring is suspended from a stand and loaded. The elongation is read-off directly from a scale. As a linear relationship is shown between the active force and the elongation of the spring, Hooke’s law can be applied.