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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News Network
May 1,2020

Melbourne, May 1: Reclaiming the top spot in Test cricket has brought smiles back on their faces but Australia coach Justin Langer says beating India in their own den remains the ultimate test and their numero uno status will be put to test when they clash with the Virat Kohli-led team.

After a tumultuous transition phase post the ball-tampering scandal, Australia on Friday displaced India as number one side in Test format but Langer is aware that it does not take long for the situation to change.

"We recognise how fluid these rankings are, but at this time it was certainly nice to put a smile on our faces," Langer told Cricket Australia website. "We've got lots of work to do to get to be the team that we want to be, but hopefully over the last couple of years not only have we performed well on the field, but also off the field," Langer added.

The former left-handed opener underlined what he felt will be the ultimate test of character.

"Certainly a goal for us has been the World Test Championship ... but ultimately, we have to beat India in India and we've got to beat them when they come back (to Australia).

"You can only judge yourself as being the best if you beat the best and we've got some really tough opposition to come," Langer put his priorities in place. The team he insists needs to get better as now others will come gunning for them.

"Getting to No.1 is a great thing, but when you're No.1, you're always the hunted," Langer said. "We've been the hunters for a while, now we're the hunted and we need to get better and better."

Langer also hoped that white ball team under Aaron Finch will win the World Cup. "I know how hard it is to win World Cups ... everything has to go right. One day, I'd love to see Aaron Finch with all his mates lift that T20 World Cup above his head."

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News Network
June 23,2020

Karachi, Jun 23: Pakistan cricketers Shadab Khan, Haris Rauf and rookie Haider Ali on Monday tested positive for the novel coronavirus.

"The Pakistan Cricket Board has confirmed three players - Haider Ali, Haris Rauf and Shadab Khan - have tested positive for Covid-19," said the PCB in a statement.

"The players had shown no symptoms until they were tested in Rawalpindi on Sunday ahead of the Pakistan men's national cricket team's tour to England."

The infected players will go into self-isolation.

"The PCB medical panel is in contact with the three who have been advised to immediately go into self-isolation," the statement said.

Earlier this month, former Pakistan captain Shahid Afridi was tested positive for the deadly virus.

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News Network
June 13,2020

New Delhi, Jun 13: Five centrally contracted Indian cricketers including Cheteshwar Pujara, Ravindra Jadeja and KL Rahul have been issued notices by National Anti-Doping Agency (NADA) for failing to disclose their whereabouts as the BCCI cited "password glitch" as the reason for delay.

The other players to have received the notice include women stars Smriti Mandhana and Deepti Sharma, who are among the five cricketers in the 110 strong National Registered Testing Pool (NRTP). Speaking to PTI, NADA DG Navin Agarwal confirmed that BCCI has sent an official explanation for their five NRTP players' failure to submit whereabouts.

"There are two ways to fill up the whereabouts form in the ADAMS (Anti Doping Administration & Management Systems) software. Either athlete does it himself or association fills it up on his or her behalf," Agarwal said. "Now athletes in some discipline aren't educated enough or do not have access to internet and find themselves unable to handle the whereabouts clause of the ADAMS or upload the filled up

"They use assistance of their concerned federations. So federations have accepted responsibility of uploading their whereabouts," Agarwal said.

He said cricketers too at times find it tough to complete the process on their own. "Similarly in cricket also, although these people are well qualified and they can do it, perhaps they don't have the time for whatever reasons, so the federation concerned, the BCCI has taken upon itself the responsibility of uploading their whereabouts." So why didnt BCCI upload the the three-month whereabouts this time?

"Well they have given an explanation which appears to be reasonable but a decision will be taken. They have said that there has been a glitch with regards to password in ADAMS. Now they have said that issue has been resolved," Agarwal added. NADA DG added that "BCCI's explanation will be discussed as to whether it will be counted as one of three filing failures or not. It will be decided on the explanation given and how they (BCCI) proceed from here."

While country has been under lockdown, the rule to submit three months of whereabouts is mandatory. Three such failures to disclose leads to one Anti Doping Rule Violation (ADRV), which could lead up to two years of suspension upon hearing.

While BCCI has "officially gagged" its employees from talking to the media, it couldn't be ascertained that why as normal a glitch as a password error took days to resolve. A BCCI veteran, who has been privy to cricket operations, asked why the five cricketers were not told to upload the form themselves.

"This was lockdown period where they are not living out of suitcases. Some of the names have also engaged in multiple instagram chats and podcasts which their agents are managing," he said.

"If cricket operations team were having a glitch in fixing password, well the five cricketers could have been asked to do so and they would have done it individually with some guidance. "Probably NADA would be lenient this time but if it becomes an official warning, then who's responsible," he added.

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