lol. thank you, jeff. i'm sure that's exactly how i meant to explain it!! but actually, you make a great point. when i think of the most satisfying swings i've had, centrifugal force is a GREAT part of it. that's why leaning back doesn't make sense - you should pull in. centrifugal force pulls you back - no need to do it yourself. in fact, i think that counteracting centrifugal force by pulling in is what makes the most satisfying swings seem totally effortless. balance IS the key. barb
> Date: Sun, 4 Sep 2011 18:35:23 -0400 > From: [email protected] > To: [email protected] > Subject: Re: [Callers] Re Swinging > > John Sweeney wrote: > > > > > If the lady additionally has their left hand on the back of the > > > the gent's right shoulder, then the lady is doing more of the > > > holding together and the gent can do less. > > > > Centrifugal force is not that great - if you are in balance the > > pressure is tiny. > > > > I think you must be talking about much slower swings than I'm talking > about. Let's say we have two 130 pound people who swing 3.5 times > around in a balance and swing. Physics geekery [1] says it takes > fourty pounds of force to hold the two of them together. I'd much > rather have that split over two people. > > Jeff > > [1] Let's approximate the dancers as point masses of 130 pounds nine > inches apart. There are 12 counts of swinging after the balance, > so about six seconds. Rotating 3.5 times in six seconds means 35 > times in sixty seconds, or 35 rpm. Force here is M*w*w*r, where > M is 130 pounds, w is 35rpm, and r is 4.5 inches. This gives > 20lbf for each dancer, or 40lbf total. > _______________________________________________ > Callers mailing list > [email protected] > http://www.sharedweight.net/mailman/listinfo/callers
