It has been suggested on other sites that if a 40 odd foot boat is pitching in an anchorage, this might be reduced by hanging a bag of rocks off the stern and possibly the bow also.
Just off the top of my head, I would guess that this bag would need to weigh a thousand pounds or more to have much effect, if any.
Can one of you really, really smart engineering types on here chime in with a bit of fact based information on this, please. Thank you.
If a 40 footer is pitching so much that you find it uncomfortable, you're going to need to be more concerned about dragging your anchor or chafing something. I wouldn't want anything hanging overboard that was going to slow down dealing with either.