The spring stiffness is quantified by the spring constant or . For various springs and materials, it varies. The stiffer the spring is and the harder it is to stretch, the larger the spring constant.
The spring constant declines as the temperature rises. The spring constant was calculated using a linear fit to the data. At higher temperatures, it is even visible that the bands of data start to spread as a result of creep.
According to Hooke's law, the restoring force is proportional to how much the spring has been compressed or stretched.
In this equation, stands for the restoring force, for the spring's stretch or contraction, and for the spring constant.
Hence, with a rise in temperature, the spring constant falls. Hooke's law is used to calculate the spring constant. The spring constant is measured in .