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Thread: Does anyone understand the physics of why a ball swings like that?

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  1. #1
    Quote Originally Posted by Ganpati's Goonerz--AFC's Aboriginal Fertility Cult View Post
    I thought I got how a football moved depdening on which part of the foot you hit it with.

    But I don't get why a ball starts off being an inswinger, changes its mind mid-flightand ends up an outswinger.

    And this is happening far more regularly nowadays.
    Have you never played football?

    When you hit the ball sweetly the ball doesn't have a high spin rate.
    Spin on the ball give it a predictable ball flight.

    When it doesn't spin (or has a low spin rate) the ball flight is erratic - I assume wind resistance plays a part.
    “Other clubs never came into my thoughts once I knew Arsenal wanted to sign me.”

  2. #2
    Tyler: We will cross to Jamie now who has a bit of extra insight.

    Jamie: Well this is how De Gea will have seen it. He has moved to his left and the ball has gone to his right.


    How much does he get paid for that?

  3. #3
    Quote Originally Posted by SWv2 View Post
    Tyler: We will cross to Jamie now who has a bit of extra insight.

    Jamie: Well this is how De Gea will have seen it. He has moved to his left and the ball has gone to his right.


    How much does he get paid for that?
    He seems a nice enough chap, Redknapp, but I'm pretty sure that nothing that you or I might describe as a thought has ever caused a ripple on the mill-pond surface of his consciousness.
    Seriously, I've had household pets that seemed more capable of abstract thought.

  4. #4
    Time for some AAR real talk. It was a speculative nothing shot that was completely ****ed up by De Gea guessing before he knew where it was going. It wasn't even close to the corner, probably only about 2 yards away from the centre. With De Gea being a World class goalkeeper what we're seeing here is the equivalent of 'celebratory face' where a dog **** comedian of the John Bishop or James Corden variety in a room packed with hopeless plebs will get fits of laughter to every joke down entirely to their celebratory status.

    It's the exact same thing we're seeing now with football illiterates blinded by De Gea's greatness. Make no mistake about it, it was dog **** goal keeping. If that Was Bruce Grobbelaar he'd have been lynched by the fans.

  5. #5
    Quote Originally Posted by Arsenal Alcoholic Review View Post
    Time for some AAR real talk. It was a speculative nothing shot that was completely ****ed up by De Gea guessing before he knew where it was going. It wasn't even close to the corner, probably only about 2 yards away from the centre. With De Gea being a World class goalkeeper what we're seeing here is the equivalent of 'celebratory face' where a dog **** comedian of the John Bishop or James Corden variety in a room packed with hopeless plebs will get fits of laughter to every joke down entirely to their celebratory status.

    It's the exact same thing we're seeing now with football illiterates blinded by De Gea's greatness. Make no mistake about it, it was dog **** goal keeping. If that Was Bruce Grobbelaar he'd have been lynched by the fans.
    But Grobbelaar never faced a ball that moved in such a bizarre manner, aar.

  6. #6
    Quote Originally Posted by Sir C View Post
    But Grobbelaar never faced a ball that moved in such a bizarre manner, aar.
    Plebs are going on as if it was that free kick from Roberto Carlos in that friendly rather than a keeper ****ing up his feet.

  7. #7
    Quote Originally Posted by Arsenal Alcoholic Review View Post
    Plebs are going on as if it was that free kick from Roberto Carlos in that friendly rather than a keeper ****ing up his feet.
    But his bodyweight was committed to the left, aar. How could he shift his weight all the way to the right that quickly?

  8. #8
    Quote Originally Posted by Arsenal Alcoholic Review View Post
    Plebs are going on as if it was that free kick from Roberto Carlos in that friendly rather than a keeper ****ing up his feet.
    No. We know it was crap keeping. If he'd just set himself, he could have waited as it wasn't far from where he started.

    I was just trying to work out why a ball swerves like that, and IUFG posted a BBC article explaining that this is causes by the seams on this new balls designed to be hit with spin.

    If you just hoof it straight, the seamscan make it move one way one second and another way the next.

  9. #9
    It’s Sorcery....black magic...voodoo...the dark arts.

    Ramsey is going so whatever forces were at work have shifted to Xhaka and were making a statement.

    From now on Every time Xhaka scores a plane will fall out of the sky.

  10. #10
    Quote Originally Posted by SWv2 View Post
    Tyler: We will cross to Jamie now who has a bit of extra insight.

    Jamie: Well this is how De Gea will have seen it. He has moved to his left and the ball has gone to his right.


    How much does he get paid for that?
    I recorded the match and watched the post game analysis.

    Apart from Souness giving the other pundits withering looks, the other fun part was 'how De Gea would have seen it' and the view then changed to some sort of blurry letterbox.
    And then went back to an angle above the goal.
    No wonder De Gea misjudged it so badly.
    “Other clubs never came into my thoughts once I knew Arsenal wanted to sign me.”

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