Al. A long drive to you is from the local bar nearest your house to your home when your DRUNK!!!!!!!!!! Question for you Al, are you still not living at home or has your wife stopped sending you jokes via E-Mail?????????
RK ----- Original Message ----- From: "Al Taylor" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, October 14, 2004 2:28 PM Subject: RE: RE: ShopTalk: long drive : Where do the various laws of physics decide what the head speed at : collision is? If the ball stays on the club face for milli or micro : seconds, and the head actually increases speed during impact, then you have : a head speed at impact and a different one at departure. Which one does : physics choose? I would guess the later but the acceleration in between : can hardly be a factor. Uhhh, that is intuitively derived, of course. : : Al : : At 11:08 AM 10/14/2004, you wrote: : >Pat, : > : >What you are saying makes sense to me intuitively, but it can only affect : >the impact for the very brief time of the collision (measured in thousandths : >of a second probably). If the clubhead is still accelerating at the : >beginning of the impact (vs. decelerating and/or constant), then it follows : >that it will be traveling faster after impact. This should translate to : >higher ball speed, but I'm guessing it will be a minimal increase. This can : >be proven if we can measure the clubhead velocity immediately pre and : >post-impact with the ball, as well as ball speed after impact. If higher : >ball speed correlates with higher post-impact clubhead speed, you have your : >answer. : > : >Tedd : > : >-----Original Message----- : >From: [EMAIL PROTECTED] : >[mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED] : >Sent: Thursday, October 14, 2004 10:47 AM : >To: [EMAIL PROTECTED] : >Subject: Re: RE: ShopTalk: long drive : > : > : >Just to reinterate - conservation of momentum applies to an isolated system, : >where no external force is appled to either object in the collision. If the : >USGA air cannon fires a ball at a fixed driver's face, conservation of : >momentum applies. If you're increasing the force applied to the clubhead at : >it impacts the ball, that increase in force upsets the isolated system : >principle, and it's conservation equation(s). : > : >But, I'm sure we'll see that I'm wrong according to Dave T...... : > : >Pat K :
