ORIGINAL: quiksilver
"with several factors being equal like arrow friction, diameter, etc."
BC - just to play devil's advocate here - my arrow is as thin as a pixy stick.
...and the laws of friction change when the materials exerting the force of friction are viscous liquids, soft tissues and bones of varying density. The entire penetration problem is a dynamic one. It's not a nuts & bolts plug-and-play equation.
Anybody wanna bet me if I can blow through a whitetail? I've got $20 that says I can.
Well, not sure about the laws of friction, but the coef of friction changes from liquids/soft tissue, and bones, but one thing does remain constant on all these materials and that thier resistence goes up exponentially with velocity.
I am not saying you can't blow thru a whitetail, I am responding to some who believe marketing hype. Or believes in videos from youtube. Physics is physics.