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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Agencies
February 26,2020

It could be Virat Kohli versus Faf du Plessis in the Asia XI-World XI two-match T20 series that has been organised by the Bangladesh Cricket Board (BCB) on March 18 and 21 -- subject to the India skipper confirming his availability.

The matches will be played to celebrate the 100th anniversary of their founding father Sheikh Mujibur Rahman. The BCB is awaiting a confirmation from Kohli as well as K.L. Rahul for the March 18 game as India are set to play South Africa on the same day in the final ODI of a three-match series at the Eden Gardens in Kolkata.

Agencies had earlier reported that the Board of Control for Cricket in India (BCCI) President Sourav Ganguly had sent the names of Kohli, Mohammed Shami, Shikhar Dhawan and Kuldeep Yadav to the BCB for the two matches. And they all feature in the Asia XI team with the addition of wicket-keeper Rishabh Pant and Rahul.

Announcing the names, BCB President Nazmul Hassan said: "We have already received four names from India. We haven't signed contracts but Rishabh Pant, Kuldeep Yadav, Shikhar Dhawan and Mohammed Shami are supposed to come. They have said K.L. Rahul and Virat Kohli will play one game each, but that hasn't been finalised.

"Players like Rashid Khan and Mujeeb Ur Rahman have finalised with us, from Afghanistan. Nepal's Sandeep Lamichhane will play while from Sri Lanka, we will have Lasith Malinga and Thisara Perera. From Bangladesh, we will have Tamim Iqbal, Mushfiqur Rahim, Mustafizur Rahman, Mahmudullah and Liton Das.

"I don't remember all the names, but we will have three or four players from South Africa. Definitely, there will be the same number of players from West Indies. Australia and New Zealand will be playing but we will try to find some (players). Bairstow is definitely coming. Ngidi is coming. Chris Gayle is supposed to play. Faf du Plessis. We will have some of the best players around. We are uncertain about Pakistan since the PSL is will be ongoing. We will invite some of the cricketing greats."

Squads: Asia XI: Virat Kohli*, K.L. Rahul*, Rishabh Pant, Kuldeep Yadav, Mohammed Shami, Shikhar Dhawan, Tamim Iqbal, Liton Das, Mushfiqur Rahim, Thisara Perera, Rashid Khan, Mustifizur Rehman, Sandeep Lamichhane, Lasith Malinga, Muzeeb ur Rehman

World XI: Alex Hales, Chris Gayle, Faf du Plessis (Captain), Nicholas Pooran, Ross Taylor, Jonny Bairstow, Kieron Pollard, Adil Rashid, Sheldon Cottrell, Lungi Ngidi, Andrew Tye, Mitchell McClenaghan. (Coach: Tom Moody)

Note: (*) For one game; Kohli's selection subject to confirmation.

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News Network
February 24,2020

Feb 24: India captain Virat Kohli had no qualms in admitting that his team was outplayed by New Zealand in the opening Test but said they "can't help" if a few want to make a "big deal" out of the 10-wicket defeat. Hosts New Zealand thrashed India by 10 wickets at the Basin Reverse on Monday to go 1-0 ahead in the two-match series. This was India's first defeat in the World Test Championship, coming after two inept batting efforts. "We know we haven't played well but if people want to make a big deal out of it, make a mountain out of it, we can't help it as we don't think like that," the skipper said at the post-match media interaction.

Kohli said he fails to comprehend why one Test match defeat should be made to look like the end of the world for his team.

"For some people, it might be the end of the world but it's not. For us, it's a game of cricket that we lost and we move on and keep our heads high," Kohli said.

It is the acceptance of defeat that defines the character of a side, the world's premier batsman said.

"We understand that we need to play well to win, also at home. There's no cakewalk at international level as teams will come and beat you. You accept it and that defines our character as a side."

It is the acceptance of defeat that defines the character of a side, the world's premier batsman said. "We understand that we need to play well to win, also at home. There's no cakewalk at international level as teams will come and beat you. You accept it and that defines our character as a side."

If he had given credence to the "outside chatter", he said the team wouldn't have been where it is now.

"That's why we have been able to play this kind of cricket. If we would have paid attention to the outside chatter, we would again be at No. 7 or 8 in the rankings. We don't really bother about what people are saying on the outside," the skipper said.

One defeat can't make a team, which has been winning games of Test cricket, "bad overnight".

"If we have lost then we have no shame in accepting that. It means we didn't play this game well. It doesn't mean that we have become a bad team overnight. People might want to change our thoughts, but it doesn't work like that."

The self-belief is intact and Kohli was confident the team would come back stronger in the second Test, to be held in Christchurch in four days time.

"We will work hard, and after four days play just like we have played all these years. Just because we have lost one match in between all wins, doesn't mean that the belief is gone. The dressing room thinks differently and team atmosphere is different."

Kohli felt that there is a very thin line between being ultra-defensive and over-attacking, something that his team didn't get it right in this Test match.

"New Zealand got into the mind of the batsmen and make the batsmen do something that they don't want to. think that's a very thin line and a very delicate balance of when to attack and when to put bowlers under pressure which we failed to do in this match and there is no harm in accepting that."

According to Kohli, it was a combination of both good bowling from the Kiwis and Indian batsmen not putting the pressure back on bowlers, which led to the drubbing.

"That has got to do with partly good bowling from New Zealand and partly us not pressing that momentum on to them when required. "It was perfect for them because they bowled well and we allowed them to bowl well for longer periods rather than doing something about it in a partnership."

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Agencies
February 4,2020

Potchefstroom, Feb 4: Yashasvi Jaiswal and Divyaansh Saxena guided India to a comfortable ten wickets win over Pakistan in the ICC U19 World Cup semifinal at Senwes Park on Tuesday and progressed to the final of the tournament.

Chasing 173, Indian openers Jaiswal and Saxena played cautiously and stitched an unbeaten partnership of 176 runs.

The duo built the highest opening partnership of the tournament's history. Jaiswal, the left-handed batsman, scored his maiden century of the tournament as he amassed unbeaten 105 runs studded with eight fours and four sixes.

Saxena scored 59* off 99 balls including six fours. India chased down the total in 35.2 overs. This is the first time in the history of the U19 World Cup that a team won a knockout match by ten wickets.

Earlier, Pakistan won the toss and elected to bat.

Opener Haider Ali and skipper Rohail Nazir's half-centuries guided the side to a respectable total of 172. Ali played a knock of 56 runs while Nazir accumulated 62 runs including six boundaries.

Pakistan did not have a good start as they lost Mohammad Hurair (4) in the second over. Fahad Munir, came to bat at number three, failed to score a single run and was departed by Ravi Bishnoi on a duck in ninth over.

Apart from Ali and Nazir, Mohammad Haris was the only batsman to score runs in double digits. He played an innings of 21 runs off 15 balls. Indian bowlers showed a spirited performance as they bowled out arch-rival in 43.1 overs.

Pacers Karthik Tyagi and Sushant Mishra bagged two and three wickets respectively. Spinner Ravi Bishnoi clinched two scalps and conceded 46 runs in his ten overs.

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