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
June 9,2020

Bengaluru, Jun 9: Former India skipper Rahul Dravid has said that Virat Kohli understands that the real respect for him as a cricketer will come through success in the longest format of the game.

Dravid, popularly known as 'The Wall', also said that Test batsmanship has become exciting to watch now as batters play aggressive shots more often.

"I actually believe Test batsmanship has become more exciting than before, the aggressive element of Test batsmanship is going forward, players are playing shots and it is good to see, a good thing for India is Virat Kohli really values Test cricket, he understands that the real respect for him as a cricketer will come from his success in Test cricket," Dravid told Sanjay Manjrekar in a videocast hosted by ESPNCricinfo.

He also said that defensive batting in cricket is not irrelevant, but added that players can have successful careers without having a good defensive technique.

"I don't think it is becoming irrelevant, maybe the value of defensive batting is not the same as it was a generation ago, it can never become irrelevant, I think you still need to defend your wicket if you want to score suns, I feel now you can survive without a good defensive technique in cricket," Dravid said.

"Today, you do not need to have a good Test career to have a successful career, look at the best players in the world today, a lot of them have a good defensive technique and they can play out difficult periods of the game," he added.

The 47-year-old Dravid also said that all young players want to represent their country in all three formats during their initial days, but eventually, they become realistic as time passes by.

"I would say in my interaction with the younger players, everyone's hero is someone who has succeeded in all formats of the game. I think all players start off wanting to play all formats, but then guys get a little realistic about their careers, superstars of the game will still want to play to all formats of the game," Dravid said.

Dravid is the only player in the history of cricket to be involved in two 300-plus ODI partnerships.

He played 164 Tests, 344 ODIs and one T20I for India. Dravid had announced his retirement from international cricket in March 2012.

He finished his career with 48 international centuries.

He has also coached the Indian junior sides (India U-19 and India A) and he is now the head of the National Cricket Academy (NCA).

Dravid has also led the side during his playing days and under his leadership, the side had managed to register their first Test series win in England.

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News Network
June 10,2020

Jun 10: "It is never too late to fight for the right cause," said opening batsman Chris Gayle as he came out in support of former T20 World Cup-winning skipper Darren Sammy. The debate around racism in sport has kickstarted once again after former Windies T20 World Cup-winning skipper Darren Sammy alleged racism during his stint with SunRisers Hyderabad in the 2014 Indian Premier League. Taking note of Sammy's revelation, Gayle tweeted: "It's never too late to fight for the right cause or what you've experienced over the years! So much more to your story, @darensammy88. Like I said, it's in the game".

Earlier, Gayle had also revealed that he too has been a victim of racism, and added that racism is something that has been bothering cricket as well.

On Tuesday, Sammy had released a video specifying that the racial slurs against him were used within the SunRisers camp.

"I have played all over the world and I have been loved by many people, I have embraced all dressing rooms where I have played, so I was listening to Hasan Minhaj as to how some of the people in his culture describe black people," Sammy said in a video posted on his Instagram account.

"This does not apply to all people, so after I found out a meaning of a certain word, I had said I was angry on finding out the meaning and it was degrading, instantly I remembered when I played for SunRisers Hyderabad, I was being called exactly the same word which is degrading to us black people," he added.

Sammy said that at the time when he was being called with the word, he didn't know the meaning, and his team-mates used to laugh every time after calling him by that name.

"I will be messaging those people, you guys know who you are, I must admit at that time when I was being called as that word I thought the word meant strong stallion or whatever it is, I did not know what it meant, every time I was called with that word, there was laughter at that moment, I thought teammates are laughing so it must be something funny," Sammy said.

The former Windies skipper has been a vocal supporter of the protests that are currently going on in the United States over the death of an African-American man named George Floyd.

Sammy had also made an appeal to the ICC and other cricket boards to support the fight against social injustice and racism.

Ever since the demise of Floyd, protests erupted from the demonstrations in cities from San Francisco to Boston.

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Agencies
March 10,2020

Mumbai, Mar 10: The addition of two new members, including the chairman, in the national selection committee, has not changed the panel's stance on M S Dhoni, who will "have to perform" in the upcoming IPL to be considered for T20 World Cup selection, a top BCCI official told PTI.

The Sunil Joshi-led selection panel met for the first time in Ahmedabad on Sunday to pick a rather "straightforward" squad for the three ODIs against South Africa beginning in Dharamsala on March 12.

Fit-again Hardik Pandya, Bhuvneshwar Kumar and Shikhar Dhawan made their way back into the side.

Joshi's predecessor MSK Prasad had made it clear that the team has moved on from Dhoni and he has to first play to be considered for selection.

Dhoni, who has not played since the World Cup semi-final loss to New Zealand in July, will be making his highly-awaited comeback in the IPL beginning March 29.

"It was a pretty straightforward selection meeting and since Dhoni was obviously not in the reckoning this time (for South Africa series), there was no formal talk about his future," a BCCI source told PTI.

"He will be back in the reckoning only if he has a good IPL. And why only him, there are so many senior and young players who will play in the IPL. If they do well, they are ought to be considered too. So, you could see some surprise inclusions," he said.

The T20 World Cup will be played in Australia in October-November and the games India play after the IPL leading up to the mega event will also be a factor in the final squad selection.

"But the performance in the IPL could be the clincher," the source added.

Head coach Ravi Shastri too has hinted that Dhoni could be back after a good IPL but his future remains a subject of intense speculation as he has not played a game in more than seven months.

With his heir apparent Rishabh Pant not setting the world on fire and K L Rahul being groomed into a full-time wicketkeeper-batsman, Dhoni's comeback cannot be ruled out.

His countless fans will finally get to see him in action when he leads Chennai Super Kings against defending champions Mumbai Indians in the IPL opener at Wankhede Stadium on March 29.

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