For small displacements of the mass relative to the length of the pendulum, and assuming that the weight of the suspending rod or wire is negligible, the frequency of oscillation is where f is the...For small displacements of the mass relative to the length of the pendulum, and assuming that the weight of the suspending rod or wire is negligible, the frequency of oscillation is where f is the frequency in hertz, k is the spring constant in kilograms per second squared (higher values indicate a stiffer spring) and m is the suspended mass in kilograms.
