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
January 10,2020

Srinagar, Jan 10: Real Kashmir FC made a strong comeback in the second half to play out a 1-1 draw against former champions Punjab FC in their home I-League match here on Friday.

The 'Snow Leopards' equalised in the 62nd minute through Gnohere Krizo in front of a partisan crowd of 8,500 spectators after Makan Chothe had given Punjab FC the lead in the 21st minute at the TRC ground.

After Thursday's draw, Punjab FC is placed third on the table with 10 points from seven games. Real Kashmir FC remained at eighth with six points from five matches. This was Real Kashmir's third home match on the trot.

The match was a story of two halves as the first belonged to the visitors who enjoyed a 62 per cent possession of the ball, whereas the second belonged to the home side.

Both the teams were looking to gain an early advantage and Punjab FC took the lead after 21 minutes.

Confusion inside the Real Kashmir box because of a long ball from Punjab opened up an opportunity for Chothe and he made no mistake as he smashed the ball at the back of the net.

As the fans cheered on, Real Kashmir created a flurry of chances, but none of the home side players could find the back of the net. Punjab was able to hold on to their slender lead heading into the tunnel.

The second half resumed with Real Kashmir pressing high up the field and pressurising Punjab.

In the 56th minute, Real Kashmir playmaker Kallum Higginbotham cut through two defenders on the left side of the box and the ball fell to Mason Robertson, whose shot was too weak to trouble the Punjab goalkeeper.

Soon after, it was Danish Farooq who tried a curler from a distance but his shot did not have enough bend to trouble the Punjab goalkeeper. The home team's effort finally paid off in the 62nd minute.

A miscalculated header by Danilo Augusto fell at the feet of Gnohere Krizo, who was one-on-one with the keeper. He made no mistake in striking the ball into the opponent's goal to score the equaliser.

Real Kashmir was in their groove now, and Kallum came in from the right with a beautiful low cross across the face of the goal but Mason could not get a touch as the chance went begging.

The duo of Kallum and Mason were proving difficult for Punjab to deal with. In the 82nd minute, a beautiful long ball by Kallum found the head of a towering Mason, but the effort went just over the crossbar.

Within a few moments, Punjab again had another nervous moment as Chesterpoul Lyngdoh's cross from the right side hit the arm of Thoiba Singh but the referee turned down an appeal for penalty.

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News Network
January 18,2020

New Delhi, Jan 18: There was not much rustiness but just the initial nervousness, which a “pleasantly surprised” Sania Mirza shook off to win a title in her first tournament in 27 months, capping off her comeback from a maternity leave in style.

Partnering Ukraine's Nadiia Kichenov, the trailblazing Indian tennis player annexed the Hobart International trophy with a straight sets win over second seed Chinese pair of Shuai Peng and Shuai Zhang.

She worked hard to get into shape but the way she moved, it seemed Sania was never away from the courts.

“It's something I did not expect totally, so to say, but I am excited to be able to do this in my first tournament on comeback," Sania told PTI in an exclusive interview from Melbourne.

“I honestly thought I would be a bit more rustier than I was. I was pleasantly surprised that I was not. But there are things I can improve and that is what makes a champion. You always want to get better in what you are doing, no matter how well you do."

The 33-year-old winner of six Grand Slam titles said she played without pressure, and insisted there was no secret to the swift success on comeback.

“There is no key, I wish I knew, there was one key to winning. I just enjoyed my game. You have to work hard, play your game. I was playing with a new partner, new gear after two-and-a-half years. There was no pressure and no expectations.

"The first match was the only one when I felt a bit nervous because I did not know how my body would react and how I would play. That match was difficult but it set the tone and momentum. I was happy to come though that one and after that things kept getting better and better," she said.

Sania said her body has certainly changed after giving birth to son Izhaan but she did not have to tweak her post-match recovery process much.

“It does change. I was dealing with a calf injury, from last month and I aggravated a bit today. I am still icing it as we speak but it should not be serious.

“The body is a lot different now. It recovers different. But recovery (process) has not changed so much, it's similar."

Asked if she could go for her shots as she was doing before the break, she said, “I was able to do enough, I can improve, no matter how I play."

"My serve was decent but I can improve. I the first match I was not serving that well and was not returning well on important points but by the time I was playing the final, I was doing both of those little better. It is a process, it does not happen overnight. It's something will keep working on."

Serena Williams set an example in 2018 when she came out playing highly competitive tennis after giving birth to her daughter Olympia. There are other tennis moms like Victoria Azrenka and Evgeniya Rodina.

Sania said she did not seek any input from tennis moms but their presence on the Tour is inspiring enough.

“I did not speak to anyone but it is inspiring to see so many moms around, playing well in different sports."

Sania will play the Australian Open mixed doubles with compatriot Rohan Bopnna after her original first-choice Rajeev Ram opted out due to health reasons.

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January 28,2020

Columbo, Jan 28: The Sri Lanka Cricket Board on Monday announced the 15-member squad for the upcoming ICC Women`s T20 World Cup, slated to commence from February 21. The board also announced five standby players for the ensuing tournament.

The squad members are -- Chamari Atapattu (captain), Harshitha Madavi (vice captain), Anushka Sanjeewani, Hansima Karunaratne, Shashikala Siriwardene, Nilakshi De Silva, Ama Kanchana, Kavisha Dilhari, Udeshika Probodhani, Achini Kulasuriya, Hasini Perera, Sathya Sandeepani, Umesha Thimashini, Sugandika Kumari, Dilani Manodara.

The standby players are -- Sachini Nisansala, Prasadani Weerakkody, Oshadi Ranasinghe, Tharika Sewwandi, Inoka Ranaweera.

Sri Lanka will take on New Zealand in their opening encounter on February 22.

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