* Depending on the purpose of your model, you may also want to have a look at this example:
* both ends of the rope are attached to the box (shown as a wireframe)
* one end is released
* the rope follows the normal laws of gravity, ie the free end drops down, the rope stretches a fraction and swings around a bit like a sluggish pendulum
* hit play to show an automatic animation
:tongue: Of course, if Newton is right, planet Earth drops up a bit on release of the rope. This can be proven by observing that your Mac performs an infinitesimal hop on the desk.