In world record, Bolt triumphed over air

July 26, 2013

Bolt_triumphedParis, Jul 26: Scientists today said Usain Bolt performed a feat of biomechanics when he ran 100m in a record 9.58sec at the 2009 World Championships in Berlin.

Crossing the line in a time that is still a world record meant Bolt had to muster "truly extraordinary" power and energy to overcome exceptional drag, they said.

Taking into account the altitude of the Berlin track, the temperature at the time of the race and the resistance caused by Bolt's 1.95m (six feet five inch), 94-kilo (207-pound) frame, the researchers calculated he had a drag coefficient of 1.2, which is less aerodynamic than the average human.

Bolt hit peak power after only 0.89 seconds, expending 81.58 kilojoules of energy by the time he finished the race.

But 92.21 percent of this energy was used to overcome air resistance, according to a paper appearing in the European Journal of Physics. Only 7.79 percent was used to achieve motion. After 41 strides, he crossed the line at 43.92 kilometres (27.29 miles) per hour.

"The enormous amount of work that Bolt developed in 2009, and the amount that was absorbed by drag, is truly extraordinary," said scientist Jorge Hernandez from the National Autonomous University of Mexcio.

"It is so hard to break records nowadays, even by hundredths of a second, as the runners must act very powerfully against a tremendous force which increases massively with each bit of additional speed they are able to develop.

"This is all because of the 'physical barrier' imposed by the conditions on Earth. Of course, if Bolt were to run on a planet with a much less dense atmosphere, he could achieve records of fantastic proportions."

The team compared Bolt's time in Berlin with his previous world-record time, of 9.69sec, set during the 2008 Beijing Olympics. In Berlin, he benefited from a tiny tailwind of 3.23 kph (2 mph), the researchers found.

Without this boost, he would have come in at 9.68sec, thus beating the previous mark by 0.01sec. The analysis was made from data provided by the International Association of Athletics Federations (IAAF), whose laser tracker recorded Bolt's position and speed every 0.1 of a second in Berlin.

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May 28,2020

New Delhi, May 28: India is not at risk of losing hosting rights for next year's Twenty20 World Cup despite its cricket board's failure to secure a tax exemption for the event, a key BCCI official has told Reuters.

Tax exemptions for International Cricket Council (ICC) events are listed as a requirement in host agreements and the BCCI was supposed to confirm they had secured one by May 18.

ESPNcricinfo, citing correspondence between the two bodies, has reported that the ICC has threatened to shift the tournament away from India over the issue.

However, BCCI treasurer Arun Singh Dhumal told Reuters that would not happen and that negotiations were continuing.

"There is no risk to the tournament," he said by telephone.

"That is a work in progress. We are discussing it with the ICC and we'll resolve it."

The BCCI encountered a similar problem when it hosted the event in 2016 when the government refused to provide a tax exemption, and there has been no change in New Delhi's stance despite the board's appeals.

Failure to secure that exemption in 2016 saw the ICC withhold an equivalent sum from India's share of revenue from the governing body's grants and it appears to be taking an even harder line this time around.

"There are certain timelines within the agreements that we collectively work towards to ensure we can deliver successful world class events and continue to invest in the sport of cricket," an ICC spokesperson told Reuters.

"In addition to this the ICC Board agreed clear timelines for the resolution of the tax issues which we are guided by."

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May 4,2020

May 4: Yuzvendra Chahal is among the best leg-spinners in international cricket right now but he can be more effective with better use of the crease, says former Pakistan spinner Mushtaq Ahmed.

Ahmed picked Chahal, Australia's Adam Zampa and Pakistan's Shadab Khan among the top leg-spinners in white-ball cricket.

"Chahal as been impressive. He is definitely among the top leg-spinners of the world. And I feel he would be more effective if he uses the crease a lot more," Ahmed said.

Ahmed, who has coached all around the world and is currently a consultant for his native team, said India's ability to take wickets in the middle-overs in the limited overs format through Chahal and Kuldeep Yadav has been a game-changer for them.

Both the wrist-spinners were brought into India's limited overs set-up following the 2017 Champions Trophy. Though, of late, both Chahal and Kuldeep havn't been playing together.

"He (Chahal) can go wide of the crease at times. You got to be smart enough to understand pitches. If it is a flat pitch, you can bowl stump to stump," said Ahmed, one of the best leg-spinners Pakistan has produced.

"If the ball is gripping, you can go wide of the crease because you can trouble even the best of batsmen with that angle. That way your googly also doesn't turn as much as the batsman expects and you end up taking a wicket."

Chahal has taken 91 wickets in 52 ODIs at 25.83 and 55 wickets in 42 T20s at 24.34. He is not a huge turner of the ball but uses his variations very effectively.

Ahmed also feels the likes of Chahal and Kuldeep have benefitted immensely from former captain M S Dhoni's advice from behind the stumps.

"You have got to be one step ahead of the batsman. You should know your field position as per the batsman's strength. I always say attack with fielders not with the ball. If you understand that theory, you will always be successful," the 49-year-old, who played 52 Tests and 144 ODIs, said.

"India has become a force to reckon with in all three formats as it uses its bowlers really well. Dhoni was a master at getting the best out of his bowlers in limited overs cricket and now you have Virat Kohli."

He also said the art of leg-spin remains relevant more than ever.

"You need leg-spinners and mystery spinners in your team as they have the ability to take wickets at any stage of the game. I see a lot of them coming through in the next 10-15 years.

"Most batsmen now like playing express pace but with a good leg-spinner in the team, you are always in the game," added member of the 1992 World Cup-winning squad.

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January 28,2020

New Delhi, Jan 28: The Board of Control for Cricket in India (BCCI) is clear that while they have no problem with the Pakistan Cricket Board hosting the 2020 edition of the Asia Cup -- set to be a preparatory ground for the T20 World Cup in Australia -- the venue needs to be a neutral one as travelling to the neighbouring country isn't an option at present.

Speaking to news agency, a BCCI official said that the hosting rights is not an issue and it is just a case of picking a neutral venue as the Indian team wouldn't be travelling to Pakistan for the T20 tournament that will see the top Asian teams in action.

"The question isn't about the PCB hosting the tournament. It is about the venue and as things stand now, it is quite clear that we would need a neutral venue. There is no way that an Indian team can visit Pakistan to even participate in a multi-nation event like the Asia Cup. If the Asian Cricket Council (ACC) is ok with an Asia Cup minus India then it is a different ball game. But if India is to participate in the Asia Cup, then the venue cannot be Pakistan," the official said.

In fact, issues in obtaining visa for Pakistan players to come and play the 2018 edition of the Asia Cup in India was one of the major reasons why the tournament was shifted out of the country with BCCI hosting the event in UAE.

The official said that the PCB can do just the same and host the event in a neutral venue. "A neutral venue is always an option. BCCI did it in 2018," the official pointed.

Cricket returned to Pakistan after a decade when Sri Lanka toured the nation in 2019. While Sri Lanka was the first nation to play a full series in the country, Bangladesh is currently in the country as they just finished playing three T20Is. They will play a Test from February 7 to 11 and then play a one-off ODI before playing the second Test from April 5 to 9.

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