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
April 28,2020

Chennai, Apr 28: Former Karnataka batsman J Arun Kumar was on Tuesday appointed coach of the USA cricket team and listed earning a Test status, by his own admission a "far-fetched" thought at the moment, among his long-term goals.

Jak, as he is known in the cricketing circles, has worked with the Karnataka team for several years and as batting coach with IPL franchise Kings XI Punjab.

"... Following an exhaustive recruitment process, former first class Ranji Trophy and IPL player and coach, J Arun Kumar, had been identified as the preferred candidate for the next men's head coach," USA Cricket chief executive Iain Higgins said on its website.

The CEO added, "He travelled to the USA to meet support staff, selectors and players at a talent camp in Houston and to continue those discussions with us.

"I'm delighted to say that we have subsequently reached agreement with Jak that he will take up the role and be permanently based in the United States as and when his working visa has been obtained."

Arun Kumar was also in charge of a fledgling Puducherry team before quitting in February owing to differences with the association officials.

The COVID-19 pandemic has however prevented a prompt departure for the United States.

"Of course, the COVID-19 crisis has now presented some challenges around the scope of the role in the short/medium term, but we look forward to completing all of the arrangements and to welcoming him more formally in due course," Higgins said.

Arun kumar, who scored over 7,200 runs in first-class cricket and over 3,000 runs in List 'A' games, had guided Karnataka to a treble for two successive seasons -- Ranji Trophy, Vijay Hazare Trophy and Irani Cup -- in 2013-14 and 2014-15.

Delighted to get the role, the 45-year old said he has a vision for USA cricket, including making it a Test-playing nation.

"The first thing is based on my visa and when the coronavirus situation will end in the US, so it's all based on that. At what time my visa will be approved, that's when I will be heading there.

"There are long, mid and short-term goals and my vision obviously will be that the USA in the coming years will be one of the Test playing nations.

"It's a far-fledged goal, but yes, that's the vision and as of now the short term will be World Cup league.

"We will have to be the top side in that and then go to the next level," Arun Kumar told PTI in an interaction.

He further said the immediate aim is to get the team together after a bad run in Nepal.

"Priority is to get the team together, we had a bad run in Nepal, so obviously the team is on little down slide, so we will get up and the immediate short-term goal is to get in touch with players.

"This lockdown gives us time to actually know each other, although we are spread out in different parts of the country, and it is gives us time to connect better and work on certain mental and tactical aspects of the game," he added.

Arun Kumar had been in the US briefly some time ago and had met some officials, selectors and players at a camp in Houston.

"I met some officials, selectors and players at a talent camp in Houston and got an insight of what I can expect in the future and based on those we have designed a pathway for junior to senior cricket and women's cricket.

"It is a work in progress," he said.

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News Network
June 20,2020

Dhaka, Jun 20: Former Bangladesh skipper Mashrafe Mortaza on Saturday tested positive for coronavirus.

The skipper had gone for a coronavirus Test last week, and now his reports have come back as positive, ESPNCricinfo reported.

As per a report in ESPNCricinfo, it is not known how Mortaza contracted the virus.

Mashrafe, also a member of the parliament from Narail 2 constituency, had stepped down as the ODI captain of the country in March this year.

Covid-19 cases have crossed 1,00,000 mark in Bangladesh and the government is now planning area-wise lockdown.

Bangladesh was slated to face Sri Lanka in July in a three-Test series and the side would have later hosted New Zealand in August, but both series look unlikely now.

The Asia Cup, scheduled for September, is also uncertain due to the coronavirus.

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News Network
March 23,2020

Colombo, Mar 23: Sri Lankan batting great Kumar Sangakkara has said he is currently in self-quarantine, following his government's guidelines for those recently returning from Europe, which has now become the epicentre of the COVID-19 pandemic.

The authorities are concerned over people returning from the most-affected COVID-19 countries in Europe not registering with the police and practising isolation.

"I have no symptoms or anything like that, but I'm following government guidelines," Sangakkara told News First.

"I arrived from London over a week ago and the first thing was there was a news bulletin saying that anyone who had travelled from within March 1 to 15 should register themselves with the police and undergo self-quarantine. I registered myself with the police."

The former captain said this even as the government confirmed there have been at least three cases of recent returnees attempting to hide the novel coronavirus symptoms from authorities.

Both Sangakkara and his former teammate Mahela Jayawardene have been active on social media, urging Sri Lankans to avoid panic and to exercise proper social distancing, as the country went into curfew on Friday evening.

Sri Lanka has so far reported more than 80 active COVID-19 positive cases in the country.

Across the world, the number of infected has crossed three lakh besides a death toll of more than 14,000 people.

Meanwhile, former Australia pacer Jason Gillespie has also gone into a two-week isolation after returning from the United Kingdom.

Gillespie, who is the head coach at Sussex, had been in Cape Town with the team for a pre-season tour, which was cut short as a result of the coronavirus outbreak.

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