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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April 25,2020

New Delhi, Apr 25: The love and loyalty of the fans will never let him leave Royal Challengers Bangalore till the time he is playing IPL, skipper Virat Kohli said on Friday.

RCB have reached the IPL final thrice but have not gone on to win the trophy.

During a live session on Instagram with former South African captain and RCB teammate AB de Villiers, Kohli said winning the tournament remains the goal but he would not leave the team irrespective of the results.

"It has been such an amazing journey. It is always going to be our dream, winning the IPL together. There is no scenario where I could think of leaving the team ever.

"You can feel emotional about the season not going well but till the time I am playing IPL, I am never leaving this team. The fans, their loyalty has been amazing," said the India skipper.

Responding to Kohli's feelings towards RCB, De Villiers too acknowledged the support of fans over the past nine years. Kohli, on the other hand, has been with RCB since 2008.

"Same for me. I never want to leave RCB but to do that I got to keep scoring runs. I am not the captain you see," said the South African in jest.

Both recalled their early days in international cricket and their growth as cricketers and friends.

Kohli said at times, the youngsters coming in have too much regard for the "system" and he wants to see them break the norm.

"I want to see youngsters coming in scoring 500-600 runs. I want people to break the norm. Sometimes I feel people have too much regard for the system in sport. When you break the shackles, you do something special."

Kohli also acknowledged contribution of Mark Boucher, Gary Kirsten and Duncan Fletcher early on in his international career.

"Gary always gave me positive feedback. Boucher told me in 2008 to improve my game against the short ball. He had the vision. Then Fletcher, he had a keen eye for the game. So many people who have contributed (to my growth)," said Kohli.

De Villiers picked the 119 at Wankhede in the 2015 series decider as his best knock against India. Kohli picked the 119 he scored in Johannesburg Test in 2013.

"I was always really motivated to win the series after 2-2 . I was incredibly motivated to do something special," de Villiers said.

They also picked their combined South Africa and India ODI team. It included Sachin Tendulkar, Rohit Sharma, Virat Kohli, Ab de Villiers, Jacques Kallis, M S Dhoni (captain), Yuvraj Singh, Yuzvendra Chahal, Dale Steyn, Jasprit Bumrah and Kagiso Rabada.

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March 27,2020

New Delhi, Mar 27: Batting maestro Sachin Tendulkar on Friday donated Rs 50 lakh to fight the COVID-19 pandemic, which has so far claimed 17 Indian lives and wreaked havoc globally.

Tendulkar's donation is so far the biggest contribution among India's leading sportspersons, some of whom have pledged their salaries while a few others have donated medical equipment to fight the dreaded outbreak, which has caused more than 24,000 deaths globally.

"Sachin Tendulkar decided to contribute Rs 25 lakh each to Prime Minister's Relief Fund and Chief Minister's Relief Fund in his bid to join the fight against COVID-19. It was his decision that he wanted to contribute to both funds," a source privy to the development, told PTI on conditions of anonymity.

Tendulkar has been associated with a lot of charity work and there has been umpteen times, he has taken up social causes, helped people, which has never been brought to public notice.

Among other prominent cricketers, the Pathan brothers -- Irfan and Yusuf -- donated 4000 face masks to Baroda police and health department while Mahendra Singh Dhoni, through a Pune based NGO, made a contribution of Rs 1 lakh.

Among athletes from other disciplines, wrestler Bajrang Punia and sprinter Hima Das are some of the prominent names to have donated their salaries in the battle against the dreaded virus which has led to a 21-day national lockdown.

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May 14,2020

New Delhi, May 14: Mahendra Singh Dhoni is an unconventional and unique leader, whose biggest strength is his incredible gut feeling, says his Chennai Super Kings teammate Faf du Plessis.

The former South Africa skipper has spent considerable time with Dhoni after joining the Indian Premier League (IPL) side in 2011 and has been an integral part of its successful journey.

"He reads the others player really well and he uses that to make instinctive decisions on the field. He's got an incredible gut feeling on the game and I think that's his biggest strength," du Plessis said in a Facebook live session with Bangladesh ODI skipper Tamim Iqbal.

The 35-year-old said Dhoni changed his perception of how a captain should be.

"It was amazing for me to see how different M S was as a captain. I used to think a captain must speak all the time in team meetings etc but M S was completely different.

"He doesn't believe a lot in team meetings. He's a very instinctive captain he's got such a good cricket brain that he relies on it to make the right decisions on the field," du Plessis said of former India skipper.

Dhoni last played for India in World Cup semifinal last year and was expected to be back to playing competitive cricket at now-postponed IPL.

Calling Dhoni the best finisher he has played with, Du Plessis said no one can emulate what the dasher from Ranchi can do with the bat.

"He's extremely calm. I haven't played with someone who is a better finisher than him. It's just remarkable to watch him from the side of the field."

"If someone else tries to do it like him they won't be able to. He's just so unique like he times the ball so late he's got an incredible calmness. He knows his game and he picks a bowler and goes for it."

Du Plessis said that playing for CSK alongside Dhoni and under the guidance head coach Stephen Fleming has taught him a lot about leadership.

"I'm lucky to have started my journey there at CSK because I have really learned a lot from a leadership point of view. I tried to learn as much as possible from Dhoni and Stephen Fleming because both are great captains."

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