Acceleration is a change in distance over a change in time
Actually it is a change in velocity (dv) over a change in time (dt). Sorry about the nitpicking, but just trying to make sure we have a physics compliant site.
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Steph
Distance is Magic; Precision is Practice.
Average Acceleration = Change in Velocity divided by a Change in Time
Now are we talking:
Linear or Angular Motion
The formulas vary slightly for both
Theta = Arc Length divided by the radius
Omega = Average Angular Velocity equals a change in theta divided by a change in time
Alpha = Average Angular Acceleration equals a change in omega divided by a change in time
Arc Acceleration = alpha times the radius
Centripetal acceleration = Omega squared times the radius
Centripetal Force = Mass times Omega Squared times the Radius
Centrifugal Force = Newtons 3rd Law to Centrifugal Force
Documented Source: "Biomechanics of Sport and Exercise" 2nd editon, Peter Mc Ginnis, Quick reference equations, p.1.
Why weren't these formulas used in the Yellow Book? Bibliography? Documented Sources/ Footnotes?
That's Ok.....I believe Homer anyway....28 years of work very impressive...but I work for a University...If I submitted that wonderful piece of work...the Dissertation Committee would have told me nice try and re-tee!!!
Last edited by annikan skywalker : 02-27-2006 at 06:41 PM.
Average Acceleration = Change in Velocity divided by a Change in Time
Now are we talking:
Linear or Angular Motion
The formulas vary slightly for both
Theta = Arc Length divided by the radius
Omega = Average Angular Velocity equals a change in theta divided by a change in time
Alpha = Average Angular Acceleration equals a change in omega divided by a change in time
Arc Acceleration = alpha times the radius
Centripetal acceleration = Omega squared times the radius
Centripetal Force = Mass times Omega Squared times the Radius
Centrifugal Force = Newtons 3rd Law to Centrifugal Force
Documented Source: "Biomechanics of Sport and Exercise" 2nd editon, Peter Mc Ginnis, Quick reference equations, p.1.
Why weren't these formulas used in the Yellow Book? Bibliography? Documented Sources/ Footnotes?
That's Ok.....I believe Homer anyway....28 years of work very impressive...but I work for a University...If I submitted that wonderful piece of work...the Dissertation Committee would have told me nice try and re-tee!!!
Those equations look mighty fine although strange to my eye. I have never seen them written out in English. I am so used to the Greek letters / mathematical forms, I had to re-read these several times to understand.
__________________ _________________________________
Steph
Distance is Magic; Precision is Practice.
Those equations look mighty fine although strange to my eye. I have never seen them written out in English. I am so used to the Greek letters / mathematical forms, I had to re-read these several times to understand.
Sorry don't know how to type Greek....My keyboard is American English as my British friends always take a jab with their light saber.........
But they are legit and documented......Stragiht from a Graduate Level Textbook used here at the Universtiy that is taught by Dr. Brian Bergerman...who has a Ph.D in Biomechanics and is one of the world's leading experts in the ther track and field event of "pole vaulting".....
BTW ...Dr. Bergerman sat on the Dissertation Committee for Dr. Ralph Mann the "Father of Model Golf".....First Question Dr. B asks...'So what do you think of Ralph Mann's work?"....Well I would never use the "Mean" to come up with a Model...I would classify them into "modal classes"...For example hitters and swingers...Pure hitters and switters...Pure Swingers and Right Arm???? Not gonna say it!!!!
We have talked about this before... but I heard this from a man that is very physics savy... Is the horse Pulling the wagon, or Pushing on the collar? You would have to ask the horse to know.
Technically... there may be little or no difference, but FEEL-wise there usually is.
We have talked about this before... but I heard this from a man that is very physics savy... Is the horse Pulling the wagon, or Pushing on the collar? You would have to ask the horse to know.
Technically... there may be little or no difference, but FEEL-wise there usually is.
If the center of mass of the object to be moved is behind the force used, it is a pull.
If the center of mass of the object to be moved is in front of the force used, it is a push.
The horse is pulling because the center of mass (sweetspot or cart) is ALWAYS behind the force being used. That is what 'lag' is all about.
Pulling has directional advantages. Pushing has power advantages.
The golf swing is always technically a PULL, from a physics standpoint.
The difficulty is that the human machine uses a lever that extends from left hand to right hand such that the 'feel' will tend to be in one side or the other.
The clubHEAD is always being pulled.
The handle may be pulled, or be pushed, depending on which side of the lever, which side of the coin, the body uses.
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