Originally Posted by sstchur
Personally, I think old adage "string low for power, tight for control" is not entirely accurate, and I think it should be tweaked to be something more like:
"string low for depth, and string tighter if you're shots are frequently flying long."
I'm not 100% sure, but I do believe there have been some studies that suggest a lower tension doesn't increase power (at least not very much) but what it does do is change the trajectory at which the ball leaves the string bed. This can help you gain depth on your shots, if that's something you're lacking, and depth is very naturally one way that we might perceive we're getting more power.
Adding mass to the racquet however, can indeed increase power. It's simply the physics of it. If you increase the mass of the racquet and swing at the same speed, you will indeed impart more speed to the ball. If you add weight and swing FASTER, you'll get even MORE power, and if you add weight but swing slower, you might not be gaining any power at all.
...theories and unreal situations. Are you going to add lead and swing faster?...only if you were swingly slowly in the first place and are capable of swinging faster.
Physics from a lay person, not someone who's actually studied physics. You know there's a problem with their "physics" explanation just because it contradicts with what you find experimentally.