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
February 14,2020

Los Angeles, Feb 14: Tributes to the late Kobe Bryant, the Los Angeles Lakers legend who died last month in a helicopter crash, will play a major role in Sunday's 69th NBA All-Star Game.

This year's annual showcase of league talent will be played in Chicago and feature numerous nods to Bryant, a five-time NBA champion who also matched a league record with four NBA All-Star Game Most Valuable Player awards.

Bryant, an 18-time NBA All-Star, died at age 41 on January 26 in a crash near Los Angeles that also took the life of his 13-year-old daughter Gianna and seven others.

All-Star teams guided by LeBron James of the Lakers and Greek star Giannis Antetokounmpo of the Milwaukee Bucks will compete to win each of the first three quarters, which will all start 0-0 and last 12 minutes.

At the start of the fourth quarter, the clock will be turned off and a final target score will be established by taking the leading club's cumulative score through the first three quarters and adding 24 points -- the number representing the jersey number worn by Bryant for the final 10 seasons of his NBA career.

The first team to reach the cumulative target score will win the NBA All-Star Game.

All-Star Game jerseys will also honor Bryant and his daughter.

Team Giannis players will wear jersey number 24 in tribute to Kobe while Team LeBron players will wear jersey number two, the number his daughter wore when playing youth basketball.

Both teams will wear jersey patches displaying nine stars, representing the nine people who were killed in the crash.

Academy Award-winning actress and Grammy Award-winning singer Jennifer Hudson, a Chicago native, will perform a special tribute to Bryant, his daughter and the others who were killed in the crash. Her performance will begin the night ahead of the player introductions.

James and Antetokounmpo each chose their squads from available starters and reserves voted and selected to the All-Star contest.

Team LeBron starters will include James, his Lakers teammate Anthony Davis, NBA scoring leader James Harden of Houston, Kawhi Leonard of the Los Angeles Clippers and Slovenian guard Luka Doncic of the Dallas Mavericks.

Team Giannis starters include the Greek big man, Cameroon stars Joel Embiid of Philadelphia and Pascal Siakam of Toronto and guards Kemba Walker of Boston and Trae Young of Atlanta.

A record eight All-Star Game players from outside the United States also include Frenchman Rudy Gobert of the Utah Jazz on Team Giannis and Team LeBron reserves Ben Simmons of Australia and the Philadelphia 76ers, Lithuanian Domantas Sabonis of Indiana and Serbian Nikola Jokic of Denver.

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News Network
January 14,2020

Sydney, Jan 14: Retired South African big-hitter AB de Villiers on Tuesday said efforts are on to ensure his comeback in the national team for the T20 World Cup in Australia, a plan in which his IPL form will play a crucial role.

Speaking to Cricket Australia's official website 'cricket.com.au', the 35-year-old swashbuckler said he would love to be back two years after calling it quits internationally. He is currently in Australia to play in the Big Bash League.

"I would love to. I've been talking to 'Bouch' (new South Africa coach Mark Boucher), (new director of cricket) Graeme Smith and (captain) Faf (du Plessis) back home, we're all keen to make it happen," he said.

"It's a long way away still, and plenty can happen – there's the IPL coming up, I've still got to be in form at that time. So I'm thinking of throwing my name in the hat and hoping that everything will work out," he added.

De Villiers, nonetheless, is keeping a check on his expectations.

"It's not a guarantee, once again. I don't want to disappoint myself or other people, so for now I'm just going to try and keep a low profile, try and play the best possible cricket that I can and then see what happens towards the end of the year," he said.

"There are a lot of players (involved with CSA) who I used to play with. Guys who understand the game, leaders of the team for many years" he said of the present dispensation.

"So it's much easier to communicate than what it used to be in the past. They understand what players go through – especially players that have played for 15 years internationally.

"It doesn't mean that everything is going to be sunshine and roses, but it's definitely a lot easier and it feels comfortable, the language that's being used and just the feel that everyone has at the moment in South Africa about the cricket," he added.

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July 26,2020

Chennai, Jul 26: Indian Grandmaster Viswanathan Anand suffered his fifth straight defeat in the USD 150,000 Legends of Chess online tournament, going down 2-3 to Peter Leko of Hungry.

The former world champion got off to a good start and won the first game of the best-of-four contest. The next two games were drawn before Leko levelled by winning the fourth.

The Hungarian then claimed the Armageddon (a tie-breaker) to ensure Anand remain winless and at the bottom of the points table.

Anand, who is making his maiden appearance on the Magnus Carlsen Chess Tour, had earlier lost to Peter Svidler, Magnus Carlsen, Vladimir Kramnik and Anish Giri.

World no. 1 Carlsen bounced back strongly to avoid an upset, beating veteran Vasyl Ivanchuk 3-2 to stay on top.

Legends of Chess is a unique event where Carlsen, Liren, Nepomniachtchi and Giri, semifinalists at the Chessable Masters (part of the Magnus Carlsen Tour), received an automatic invite and are up against six legends aged 40-52, who have been at the top of world chess at various points in their career.

The tournament is part of the Magnus Carlsen Chess Tour. The winner of this event will qualify for the USD 300,000 Grand Final scheduled from August 9 to 20.

Results of Round 5: Peter Leko beat Viswanathan Anand 3-2; Magnus Carlsen beat Vasyl Ivanchuk 3-2: Vladmir Kramnik beat Ding Liren 2.5-1.5; Anish Giri beat Boris Gelfand 2.5-1.5; Ian Nepominiachtchi beat Peter Svidler 3-1. 

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