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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July 18,2020

Johannesburg, Jul 18: Cricket South Africa (CSA) on Saturday mourned the demise of former spinner Ismail 'Baboo' Ebrahim who died in Durban at the age of 73.

"Baboo was one of the outstanding South African spin bowlers of the 1960s and 1970s who would undoubtedly have played as many Test matches for his country as the 48 first-class games to which he was limited," CSA said in a statement.

In those matches, he took 179 wickets at an average of 21.33 with an economy rate of 2.12 including 8 five-wicket hauls and 2 ten-wicket hauls.

The left-arm spinner only had one opportunity on the international stage when he played for a SA Invitation XI against the International Wanderers at Kingsmead in 1976.

"At the age of 29, he was in his prime and took a match-winning 6/66 in the second innings, his victims including international captains, Greg Chappell of Australia and Mike Denness of England. It was a clear indication of what he could have achieved on grounds around the world at the highest level had he been given the opportunity. He was a master of flight and spin and had a good arm ball to back it up," the statement read.

His ability to perform at this level had become apparent much earlier when he went to watch the Australians at practice before their Test match against South Africa in 1970.

He persuaded the Australians to let him bowl to them and made an immediate impression, bowling experienced Test batsman Ian Redpath and impressing the likes of Ian Chappell and Ashley Mallett, the latter being Australia's leading spinner of the 1970s.

He had one season for Radcliffe in the Lancashire Central League when he took 62 wickets at 14.62 apiece.

Baboo finally got his chance to represent his country in Masters events in one of which he dismissed both Sir Vivian Richards and Gordon Greenidge.

"Baboo Ebrahim was one of the countless number of outstanding cricketers who was denied the opportunity to display his talents to the world and live his cricketing dreams," said CSA Acting Chief Executive, Dr Jacques Faul.

"On behalf of the CSA Family I extend our deepest sympathy to his family, friends and cricketing colleagues," he added. 

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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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