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 30,2020

Jan 30: Three days after Los Angeles basketball great Kobe Bryant, his 13-year-old daughter and seven others perished in a helicopter crash, his wife, Vanessa, broke her silence with an Instagram message saying she was “completely devastated” by their loss.

The social media text was posted alongside a recent family photo of Kobe and Vanessa Bryant with all four of their daughters - Gianna, who died with her father, along with the couple’s eldest, Natalia, 17, 3-year-old Bianka, and the youngest, Capri, born in June 2019.

Kobe Bryant and the couple’s second daughter, knicknamed Gigi, died on Sunday when the helicopter they were flying in en route to the Mamba Sports Academy for a girl’s basketball tournament crashed in foggy weather on a hillside northwest of Los Angeles.

Gianna Bryant was a member of the Mamba team due to compete that day. Her father, who retired from the National Basketball Association in 2016 after 20 years with the Los Angeles Lakers, was the coach of his daughter’s team. ]

The pilot and six more passengers were also killed - two other 13-year-old girls involved in the tournament, three of their parents and another coach. The cause of the crash remains under investigation.

The death of Bryant, 41, an 18-time NBA all-star, five-time Lakers champion and one of the world’s most admired sports figures, unleashed an outpouring of grief and tributes from fans, fellow athletes and politicians around the globe.

“My girls and I want to thank the millions of people who’ve shown support and love during this horrific time,” Vanessa Bryant, 37, a former model, wrote on her Instagram account.

“We are completely devastated by the sudden loss of my adoring husband, Kobe — the amazing father of our children; and my beautiful, sweet Gianna — a loving, thoughtful, and wonderful daughter, and amazing sister to Natalia, Bianka, and Capri,” she added.

The message goes on to say: “We are also devastated for the families who lost their loved ones on Sunday, and we share in their grief intimately. There aren’t enough words to describe our pain right now.

“I take comfort in knowing that Kobe and Gigi both knew that they were so deeply loved. We were so incredibly blessed to have them in our lives. I wish they were here with us forever. They were our beautiful blessings taken from us too soon.”

She directed anyone wishing to “further Kobe and Gianna’s legacy in youth sports” to visit the site MambaSports Foundation.org.

There has been no word yet on funeral arrangements.

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Agencies
June 9,2020

The International Cricket Council (ICC) has confirmed interim changes to its playing regulations, which include the ban on the use of saliva to shine the ball and allowing home umpires in international series as per a release issued by the international body.

The ICC Chief Executives' Committee (CEC) ratified recommendations from the Anil Kumble-led Cricket Committee, aimed at mitigating the risks posed by the COVID-19 virus and protect the safety of players and match officials when cricket resumes.

COVID-19 Replacements

Teams will be allowed to replace players displaying symptoms of COVID-19 during a Test match. In line with concussion replacements, the Match Referee will approve the nearest like-for-like replacement.

However, the regulation for COVID-19 replacements will not be applicable in ODIs and T20Is.

Ban on Saliva on Ball

Players will not be permitted to use saliva to shine the ball. If a player does apply saliva to the ball, the umpires will manage the situation with some leniency during an initial period of adjustment for the players, but subsequent instances will result in the team receiving a warning.

Whenever saliva is applied to the ball, the umpires will be instructed to clean the ball before play recommences.

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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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