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  1. J

    Wardlaw's Directionals and Doubles

    The basic criterion at the college level is: A ball should be put at the location away from both opposing players These rules are combined with rules what to do with the return of serve. All rules about handling in and out balls are completely secondary
  2. J

    Wardlaw's Directionals and Doubles

    No to the last question
  3. J

    PlaySight

    It is very difficult to use a radar gun to measure a speed of forehand let say for a sequence of 20 shots You have to try to see multiple problems
  4. J

    PlaySight

    My response was in the context of Post #71 A byside comment: In the case of comparison with a radar gun the location of the radar gun matters We/ our club put a radar gun just OVER a net in the case of a serve so we measure a speed of a ball slowned down over the half of the court
  5. J

    How Novak Djokovic Aced the Serve

    At some levels of high school sectionals a coach can request a roving referee. It is considered to be uncivil somehow. I had an experience like that 2 years ago. Basically there is no solution for the problem you described
  6. J

    How Novak Djokovic Aced the Serve

    Does Suresh qualify as human?
  7. J

    How Novak Djokovic Aced the Serve

    As you know one can request a mark check on clay New Dunlop Fort balls leave a mark on hard surfaces
  8. J

    How Novak Djokovic Aced the Serve

    I do NOT think it is possible for Suresh
  9. J

    PlaySight

    Hitti a ball j. Baseball is different than golf swing
  10. J

    PlaySight

    I have suggested to google Bruce Elliot forehand You will get some info how the oncoming balls are fed The incoming balls are not fed for serve If you say it does not matter it is the end of the conversation
  11. J

    PlaySight

    A forehand has an input parameter - a speed of an incoming ball Generally a ball machine is used- very easy to do The first question is whether the incoming ball contributes
  12. J

    PlaySight

    You are producing terrible psts The methodology for forehands is different than for serve Go to a library and read some papers by Brice Elliot
  13. J

    Best stringer in Austin?

    Why did you post in this forum?
  14. J

    Smash and serve similarity

    Whining should be forbidden I am very disappointed in you
  15. J

    Low-pace up/down topspin serve

    You should be serious on week days You should try to go to a tennis shop, ask for 30 pounds of tension and play in San Diego for 6 months with a racket strung like that
  16. J

    100 MPH serve

    You have to ask leed whether his past is sarcastic or not
  17. J

    The fast low bouncing version of the Bigservesofthands first serve

    your posts are impossible to read Try to read your sentence starting with the word "so" to see whether you r own post
  18. J

    The fast low bouncing version of the Bigservesofthands first serve

    Switching to a different subject The major weakness of Sock is his forehand return of serve The return of serve resembles the forehand rally stroke See the last French Open match between Nadal and Sock lost by Sock
  19. J

    The fast low bouncing version of the Bigservesofthands first serve

    As you know Brian Gotdon/Rick Macci has a "system" for theseuoses
  20. J

    The fast low bouncing version of the Bigservesofthands first serve

    Once more: you have to distinguish three different notions 1.parametric acceleration for golf 2. parametric acceleration for serve 3. parametric acceleration for forehand Equations of motion are not exactly the same- the direction of gravity matters On a top of it item 1 is a problem with a very...
  21. J

    The fast low bouncing version of the Bigservesofthands first serve

    Try to split the last sentence into two Reading your posts blows a brain of a reader The concept of landing backward is not very easy to defend (assuming that you promote it one way or another). The basic tenant of modern serve is to combine two momenta of a body- forward and upward. These two...
  22. J

    The fast low bouncing version of the Bigservesofthands first serve

    You should write epsilon*sin(theta) instead of dropping the multiplication symbol * The way the equation is written now is incorrect because it is not an equation right now in the first place Your sentences are too long - I cannot understand the last sentence of the post
  23. J

    100 MPH serve

    Some posters do have 3 moments of inertia One poster coming from India has only one moment of inertia I do not like this Forum
  24. J

    The fast low bouncing version of the Bigservesofthands first serve

    Researchgate.net has the related article by Nsbit and McGinnis of 2014 for golf
  25. J

    The fast low bouncing version of the Bigservesofthands first serve

    Please see that the symbol of the second derivative of theta is missing
  26. J

    The fast low bouncing version of the Bigservesofthands first serve

    Please note that you did not define theta
  27. J

    The fast low bouncing version of the Bigservesofthands first serve

    You are failing completely in terms of presentation because you do not define parametric acceleration for serve The definition for golf does not help
  28. J

    100 MPH serve

    The language is a bit flawed The moment of inertia is a function of two: 1.the frame of reference 2. a distribution of mass It does not depend of kinematics/equation of motion
  29. J

    Is this a good idea?

    It is very confusing Besides massages the OP talks about matching Are you sure that we are at the correct Web site?
  30. J

    Is this a good idea?

    A nap is better than an app
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