http://boxingscience.co.uk/science-behind-punch/

Relevant to slinging too

Nice! Now I can use my sling for distance and my guns for hand-to-hand conflicts (*rips arm sleeve flexing biceps to show my guns*).

I've only been out slinging for ~30 hours but I don't think there is much of a difference in the stones initial velocity (upon release) with respect to weight. This might not hold true for exceptionally heavy stones. I think I meet a limitation on how fast I can accelerate my arm. When I have a heavier stone in the pouch, I am able to send a lot more force to the stone so that I can achieve a similar acceleration. I'm basing that there is a near constant acceleration from observation. I here the sound from the sling on the power stroke, look at the distance of the stone reaches (obviously a heavier stone has more momentum), feel the change in direction and force of the rentention cord around my finger, and see the speed of the stone as it is flying away from me.

I have been using strong synthetic single cord materials instead of braids and using split pouches in my slings in order to cut down the weight and aerodynamic drag as much as practical. This was to address the limitation on force that I can apply. But in practice, I don't think my limitation has to due with the amount of muscle I have (refer to my initial statement about flexing my guns) but rather how fast I can make them work.

I have not delved into the mechanics of the sling yet so maybe this discussion has already been had in much more detail. Insights on this would be much appreciated and I think it would help me understand what I'm doing.

Edit: just to clarify, what I wrote only applies to shots for maximum distance, disregarding accuracy.