Defines a mass-spring-damper system: mx'' + cx' + kx = 0. Equivalent: x'' = -(c/m)x' - (k/m)x.
Mass (non-zero)
Damping
Spring constant
Defines a mass-spring-damper system: mx'' + cx' + kx = 0. Equivalent: x'' = -(c/m)x' - (k/m)x.