This is a simulation of a mass attached to a spring without frictional forces. It oscilates around an equilibrium position.

Problem of a sliding block (m2) pulled by a falling block (m1)

Simulation der Bewegung auf einer geneigten Ebene mit Luftwiderstand und Gleitreibungskraft

This shows the motion of a driven damped harmonic oscillator, described in terms of the undamped natural frequency, and a frequency gamma that reflects the degree of damping, parameterized as a damping ratio gamma/natural frequency. 

Z205 from System Zoo 1 p95-98

Confused - don't know how to proceed.

Model mengenai mass-damper-spring system pada suspenstion system kendaraan.

Problem of the car slowing down under friction and drag