<br /> <div class="img-caption-wrap img-caption-wrap-left"> <img alt="Australian physicists discuss Shane Warne's 'ball of the century'; provide interesting insights into cricket" src="https://st2.cricketcountry.com/wp-content/uploads/cricket/image_20130704204534.jpg" title="Australian physicists discuss Shane Warne's 'ball of the century'; provide interesting insights into cricket" /> <p class="imgcaptionnew" style="width:290px;"> A pair of Australian scientists said that there are some powerful principles of physics behind a delivery like Shane Warne's 'ball of the century' that bamboozled Mike Gatting during Ashes 1993 © Getty Images</p> </div> <strong>Paris: Jul 4, 2013</strong><br /> <br /> Twenty years ago, <a href="/tags/Australia/post" target="_blank">Australia</a>'s <a href="https://www.cricketcountry.com/cricket-articles/Shane-Warne-bowls-Mike-Gatting-with-the-Ball-of-the-Century/27437" target="_blank">Shane Warne flighted the "Ball of the Century"</a> that famously bamboozled England's <a href="/tags/Mike-Gatting/post" target="_blank">Mike Gatting</a> and reminded everyone of the marvels of leg-spin bowling.<br /> <br /> Behind such deliveries lie some powerful principles of physics, a pair of Australian scientists said on Thursday, in a study published just ahead of a new Ashes series.<br /> <br /> Not only their team, but also <a href="/tags/England/post" target="_blank">England</a> will be able to benefit from the formulae uncovered — if they can get past the layers of mathematical equations and graphs, that is.<br /> <br /> The study by brothers Ian and <a href="/tags/Garry-Robinson/post" target="_blank">Garry Robinson</a>, published in the journal Physica Scripta, provides tools with which to measure the impact of forces like gravity, atmospheric drag, wind and "lift" on the trajectory of a randomly spinning ball.<br /> <br /> "The average cricketer could not be expected to fully understand the details of the physics of the paper," co-author Ian Robinson of the University of Melbourne told <em>AFP</em>.<br /> <br /> But luckily, a special poster has been prepared with pictures to illustrate the on-pitch meaning of the equations.<br /> <br /> And a "user-friendly, interactive version" of the simulation programme is under development for computer, said a statement.<br /> <br /> "It should be emphasised that the examples presented in the paper are just that — examples," said Robinson.<br /> <br /> "They do not pretend to provide a definitive answer to questions such as: 'How do I bowl the perfect off-spin delivery?"<br /> <br /> Spin bowlers use their fingers or wrist to put movement into the ball as they release it, causing it to deviate from a straight trajectory when it bounces off the pitch, hopefully fooling the batsman.<br /> <br /> Spin balls travel much slower than those despatched by fast bowlers, who seek to deceive the batsman through speed rather than surprise.<br /> <br /> The Robinson brothers said their paper was motivated by an interest in physics "and a long love of sport" -- and insisted its timing just ahead of the Ashes series, starting on July 10, was purely coincidental.<br /> <br /> "The effects... are probably very well known to class spin bowlers, so we are not attempting to tell them what they already know," they wrote.<br /> <br /> "However, the paper has served to quantify the effects and provide a means of treating other combinations of spin and winds."<br /> <br /> Among other things, the paper was able to measure the impact of wind on "lift" or "Magnus" force, a course-changing effect that only occurs with a spinning ball. A cross-wind of only 14 kilometres per hour (nine miles per hour) could divert the point of pitching of a spinning ball by as much as 14 centimetres [5.5 inches], wrote the brothers.<br /> <br /> "These effects may well be enough to deceive the batsman."<br /> <br /> They added the effects of the ball seam were not included in their calculations, and the results "are really an approximation to the real situation."<br /> <br /> So what was the secret of the Ball of the Century?<br /> <br /> Well — since you asked — it was a combination of drag force (Fd), Magnus force (Fl), velocity vector (V) and angular velocity vector (w).