11. A " spring constant " defines the force output for a tension or compression of the spring. 12. Where k is the spring constant ( or force constant ), which is particular to the spring. 13. Analysis of this model gives the complex viscosity in terms of the dashpot constant and the spring constant . 14. To determine F \, it is necessary to find the torsion spring constant \ kappa \,. 15. The spring constant of suspended graphene sheets has been measured using an atomic force microscope ( AFM ). 16. Where k _ \ theta is the spring constant of the angular spring ( Nm / radian ). 17. Since the inertia of the beam can be found from its mass, the spring constant can be calculated. 18. The linear elastic performance of a spring is parametrized by a constant of proportionality, called the spring constant . 19. ^2 }, of a ground state quantum harmonic oscillator, due to an adiabatic increase in spring constant . 20. The amount of force can be determined by multiplying the spring constant of the spring by the amount of stretch.