# Formula Undamped Harmonic Oscillator Maximum velocity    Amplitude    Mass    Spring constant

## Maximum velocity

Unit
Maximum velocity that can occur in a harmonic oscillation. For a spring pendulum, it is the maximum velocity of the mass connected to a spring. Here $$\omega = \sqrt{ \frac{D}{m} }$$ is the angular frequency:$$v_{\text{max}} ~=~ \omega \, A$$

## Amplitude

Unit
Maximum deflection of a harmonic oscillator. In the case of a spring pendulum, it is the maximum distance of the mass from the rest position of the spring (undeflected mass).

## Mass

Unit
Mass of the harmonic oscillator. For a spring pendulum, it is in good approximation the mass hanging on the spring. In the case of a spring whose mass cannot be neglected, a part of the mass of the spring must also be taken into account in $$m$$ because it also oscillates.

## Spring constant

Unit
Spring constant describes the stiffness of a spring, i.e. how well the spring can be deflected.