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Spring

An elastic link that pulls bodies toward a rest length, like a real spring with a damper.

How to add

Use the Joint tool (J), then set type Spring in the properties.

Properties

Length
The free length of the spring, the distance at which the force is zero.
Stiffness k, N/m
The larger it is, the more the spring resists stretching.
Damper, N·s/m
Damps oscillation. Without it the spring oscillates forever.

Tips

  • Oscillation period T = 2π√(m/k): add a chart and check it.
  • On the canvas the spring is drawn as a zigzag.

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