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 20,2020

New Delhi, Feb 20: Grappler Divya Kakran on Thursday became the second Indian woman to win a gold medal at the ongoing Asian Wrestling Championship.

Divya, a bronze medallist at Asian Games 2018, earned her first gold by winning all her four bouts against Kazakhstan, Mongolia, Uzbekistan and Japan.

Her final bout against Naruha Matsuyuki of Japan was the closest one but she managed to outclass her opponent 6-4 to seal her name on the gold medal. The 68 kg category was played in round-robin format as only five wrestlers were in the fray.

India is likely to add some more medals to its tally when Nirmala Devi, Pinki, and Sarita go out to grapple for the yellow metal in their respective weight categories.

Three-time Commonwealth championship gold medallist, Nirmala Devi (50 kg) first defeated Munkhnar Byambasuren of Mongolia in the quarterfinals by 6-4 to reach the semis.

In the semi-finals, Nirmala got the better of Dauletbike Yakhshimuratova of Uzbekistan by 10-0 and will play against 2018 Under-23 World Champion Miho Igarashi of Japan for the gold medal.

Pinki (55 kg) started her day on a winning note against Shokhida Akhmedova of Uzbekistan by 12-4 in round 3 and lost to Kana Higashikawa of Japan to enter the semis where she defeated Marina Zuyeva of Kazakistan by a score of 6-0.

Pinki will play in the gold medal bout against Dulguun Bolormaa of Mongolia.

Sarita (59 kg) will now face Battsetseg Altantsetseg of Mongolia in the gold medal bout after winning against her opponents in the qualifiers, quarterfinals and semi-final by a score of 10-0, 11-0 and 10-3, respectively.

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News Network
February 16,2020

Feb 16: Mayank Agarwal finally found some form going his way and Rishabh Pant mixed caution with his customary aggression as India's warm-up fixture against New Zealand XI ended in a draw in Hamilton on Sunday. The match was called off an hour after lunch with India reaching 252 for four just 48 overs into their second innings. Agarwal, who had gone through a wretched period since the second Test against Bangladesh, retired on 81 off 99 balls with 10 fours and three sixes to his name. To the relief of the Indian team management, Pant played in his customary manner to reach 70 off 65 balls, but also showed discretion when the opposition bowlers were in the midst of a good spell.

There were four sixes -- two each off leg-spinner Ish Sodhi and off-spinner Henry Cooper. While Sodhi was hit down the ground, Cooper was dispatched over extra cover on a couple of occasions.

He didn't curb his aggression though; there were times when he was ready defend against the spinners and also leave some of the deliveries that the Kiwi pacers bowled.

Even though Pant is easily the better batsman compared to his senior Wriddhiman Saha, the innings might have come too late in the day considering that the latter is a better keeper and possibly a more responsible batsman in pressure situations.

The biggest positive to have emerged from the second innings is Agarwal's poor run coming to an end.

The Seddon Park track easing out was definitely a factor but Agarwal's footwork was more assured as he played some glorious on-drives and pull-shots off fast bowlers.

Before this game, Agarwal had played 10 competitive games including first-class, ODIs and List A matches and couldn't cross the 40-run mark in 11 completed innings.

He even bagged a pair against New Zealand A in an unofficial Test match. Once he had got his form back, he didn't come out to bat after lunch giving Saha an opportunity to score an unbeaten 30, his runs coming mostly against non-regular bowlers.

The Agarwal-Pant pair added 100 runs in 14.3 overs and it also helped that part-timers like Cooper was introduced into the action. In the morning, Prithvi Shaw (39 off 31 balls) was bowled through the gate by Daryl Mitchell as the batsman left a gaping hole between his bat and pad.

Shaw, though, seemed to have done enough during his brisk 72-run stand with Agarwal, which could put an end to the debate around the opening slot even though the tracks in Wellington and Christchurch could be a test of technique for the flamboyant Mumbaikar.

It was a match that Shubman Gill would perhaps like to forget in a hurry as he was dismissed cheaply for the second time in a row. He scored 8 before Daryl Mitchell trapped him leg before.

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News Network
June 29,2020

Jun 29: The West Indies cricketers will sport a 'Black Lives Matter' logo on the collars of their shirts during the upcoming three-Test series against England to protest against racism in sports.

Skipper Jason Holder, who has voiced his support to the cause that has once again come to the forefront after the killing of American George Floyd, said in a statement on Sunday: "We believe we have a duty to show solidarity and also to help raise awareness."

The ICC-approved logo, designed by Alisha Hosannah, will be the one which featured in the shirts of all 20 Premier League football clubs since the sport's resumption earlier this month.

"This is a pivotal moment in history for sports, for the game of cricket and for the West Indies cricket team," Holder was quoted as saying by ESPNcricinfo.

"We have come to England to retain the Wisden Trophy but we are very conscious of happenings around the world and the fight for justice and equality. "As a group of young men, we know of the rich and diverse history of West Indies cricket and we know we are guardians of the great game for a generation to come."

Holder, who wants racism to be treated at par with doping and corruption, said they arrived at the decision to wear the logo after much thought.

"We did not take our decision lightly. We know what it is for people to make judgments because of the colour of our skin, so we know what it feels like, this goes beyond the boundary. There must be equality and there must be unity. Until we get that as people, we cannot stop," he said.

"We have to find some way to have equal rights and people must not be viewed differently because of the colour of their skin or ethnic background."

The West Indies players are likely to wear the shirts for the first time in this week's four-day warm-up match at Emirates Old Trafford, starting on Monday.

The opening Test of the series, which will mark the resumption of international cricket after the coronavirus-forced hiatus, will get underway at the Ageas Bowl in Southampton on July 8.

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