Re: Poms view of the Gilly debate

Gavin Cawley <gcc@xxxxxxxxxxxxx> wrote in
news:1179515421.980737.212110@xxxxxxxxxxxxxxxxxxxxxxxxxxxx:

On 18 May, 19:53, Martin Durkin <nos...@xxxxxxxxxxxxxxxxxxxx> wrote:
Gavin Cawley <g...@xxxxxxxxxxxxx> wrote in
news:1179513673.137659.263710 @w5g2000hsg.googlegroups.com:



But is this valid for a bat that is accelerating through the ball
due to an "external" force?

Not sure about the rest but I think you are wrong about the
acceleration being significant. The collision between bat and ball
only lasts for about 1 ms, so any acceleration of the bat during that
short time span is probably insignificant. All that matters is the
relative speed between bat and ball.

That could well be the case, are there documented measurements of bat
acceleration and contact time?




THere were some on the website I quoted, but not all the pages seem to be
available tonight. I took the liberty of emailing Dr Russell whose page it
is and he gave me the 1ms figure.
.

Relevant Pages

  • Re: Poms view of the Gilly debate
    ... Not sure about the rest but I think you are wrong about the acceleration ... The collision between bat and ball only lasts for about ... so any acceleration of the bat during that short time span is ...
    (uk.sport.cricket)
  • Re: Poms view of the Gilly debate
    ... But is this valid for a bat that is accelerating through the ball due ... Not sure about the rest but I think you are wrong about the acceleration ... probably insignificant. ...
    (uk.sport.cricket)
  • Re: Poms view of the Gilly debate
    ... acceleration being significant. ... The collision between bat and ball ... relative speed between bat and ball. ... I'd guess the collision time for cricket would be longer as the bat is ...
    (uk.sport.cricket)
  • Re: Newtons inverse-square force law from Einsteins equation
    ... i found your 2000 post, Richard, and i have a neophyte question. ... As time passes the ball changes volume; ... define acceleration 'a' in terms of change in Volume 'V' as: ... and spherical surface area '4*pi*r^2 ' are considered. ...
    (sci.physics.research)
  • Re: Some propellantless propulsion fun
    ... For how much time is the ball accelerated? ... in the wall so it will have the entire 10 meters to travel. ... I specifically asked you how long the acceleration ... detect motion, so it will not be in the box. ...
    (sci.physics)