In response to a request in video comments, this video creates a pair of dangling earrings from default props and adds physics to make them dangle using point to point constraint.
This is awesome, I have been trying to do this for ages and could never get it to work. This has opened a world of possibilities. Thanks a million, peace from Scotland
You could but it likely wouldn't look very effective (a single stiff swinging tail). A better strategy for a tail (if it has bones or if you can add them) is to use spring effects or manually animate. Another option might be to use soft physics but it would be a limp hanging tail. I think theres some examples of the spring effect in the manual. Good luck!