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 21,2020

New Delhi, Apr 21: India skipper Virat Kohli on Tuesday said people seem to have become more compassionate while coping with the COVID-19 pandemic and hoped the sense of gratitude towards frontline workers like doctors and police personnel remains even after the crisis is over.

Speaking in an online class organised by "Unacademy", Kohli and his actor wife Anushka Sharma spoke at length about the challenges they faced before tasting success.

"The one positive out of this crisis that we as a society have become more compassionate. We are showing more gratitude to the frontline workers in this war, be it police personnel, doctors or nurses.

"I hope it stays this way even after we overcome this crisis," said Kohli with Sharma seated next to her.

Kohli said the pandemic has taught the world a very important lesson.

"Life is unpredictable. So, do what makes you happy and not get into comparisons all the time. People have a choice now how to come out of this phase. Life is going to be different after this," said the skipper.

For Sharma, the pandemic has forced people to care about the basics in life.

"There is a learning in all of this. Nothing happens without a reason. If the frontline workers were not there, we would not have access to basics," she said..

"This has taught us that no one is special than the other. Health is everything. We are more connected as a society now," she added.

During the session, Kohli was asked about the moment when he felt most helpless.

"I felt nothing was working for me when I was not picked for the state team initially. I cried the whole night and asked my coach 'why did I not get selected'?" he responded.

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February 21,2020

Wellington, Feb 22: shant Sharma's lion-hearted bowling effort met its match in Kane Williamson's elegance as New Zealand ended an attritional second day of the opening Test against India with a slight upper-hand, here on Saturday.

After another lower-order collapse that saw India get bundled out for 165, Ishant, coming straight back from an ankle injury, took three for 31 in 15 overs despite Williamson's effortless 89 in New Zealand's day-end score of 216 for 5.

New Zealand now lead by 51 runs.

Mohammed Shami (1/61 in 17 overs), during his final spell of the day, removed Williamson, who couldn't check an uppish drive. Henry Nicholls' (17 off 62 balls) struggle seemed to have hampered Williamson's rhythm.

During the final hour, Ravichandran Ashwin (1/60 in 21 overs), who also bowled beautifully throughout the day, relieved Nicholls' of his agony with a delivery that had drift and a hint of turn as India skipper Virat Kohli snapped the low catch at second slip.

Williamson looked good as he hit some delightful strokes square off the wicket. The square drive on the rise off Jasprit Bumrah (0/62 in 18.1 overs), followed by a cover drive, showed his class.

In all, the New Zealand skipper hit 11 boundaries off 153 balls.

Bumrah, in particular, was punished by Williamson, who also back-cut him for a boundary and Taylor then punished another half volley through the covers.

There were quite a few loose deliveries on offer from the Indian pacers and in between a few did beat the bat. With the 'Basin' baked in sunshine, batting became lot more easier and Black Caps seized the initiative.

Bumrah, in particular, failed to find his length consistently. Either he bowled too full and drivable length deliveries or too short that even Rishabh Pant failed to gather with the ball going a couple feet over his head.

This is where Ishant came into the picture. While he was lucky to get opener Tom Latham out with a delivery drifting on leg-stump, the other opener Tom Blundell (30) had a typical Ishant dismissal written all over it.

The ball was full on the off-stump channel and jagged back enough to find the gap between his bat and pad.

Williamson and Taylor then had a partnership of 93 runs during which New Zealand also got the lead before Ishant, coming back for his third spell, bowled one that reared up from good length and proved to be an easy catch for Cheteshwar Pujara at short-leg.

Once Nicholls came in, Williamson, who was batting fluently, suddenly had a player at the opposite end who scored only 4 off 34 balls.

Looking good for his 22nd Test hundred, Williamson, in his bid to get another boundary, couldn't check a cover drive and the low catch was taken by substitute fielder Ravindra Jadeja.

Earlier, New Zealand's debutant Kyle Jamieson and veteran Tim Southee took four wickets apiece as Indian innings folded in 68.1 overs.

Jamieson (4/49 in 16 overs) and Southee (4/49 in 20.1 overs) took four of the five wickets that fell on the second morning with India adding only 43 runs to their overnight score of 122 for 5.

Rishabh Pant (19) started with a six but then a horrible mix-up with senior partner Ajinkya Rahane (46) resulted in a run-out and the little chance of recovery was gone for good.

It was a poor call from the senior player and Pant had to sacrifice his wicket in the process.

Ashwin then received a beauty from Southee, pretty similar to what Prithvi Shaw got, while Rahane inside edged one while trying to leave it alone.

With India at 132 for 7, Rahane knew that time was running out as he played a square drive off Trent Boult to get him a boundary.

Southee then got rid of Rahane when he tried to shoulder arm a delivery that made a late inward movement. Mohammed Shami's entertaining 21 then enabled the visitors to cross the 150-run mark.

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News Network
February 26,2020

Melbourne, Feb 26: On a high after two easy victories on the trot, including one against defending champion Australia, the Indian women's cricket team will aim to inch closer to a semifinal berth when it takes on New Zealand in the ICC Women's T20 World Cup here on Thursday.

The Indians have hardly broke a sweat in their 17-run and 18-run wins over hosts Australia and Bangladesh in their previous two matches, and they are perched at the top of five-team Group A standings with four points from two matches.

A win against New Zealand on Thursday will take the Harmanpreet Kaur-led side on the threshold of a knock-out stage spot, to be competed among top two teams from Group A and B.

In the two matches so far, the Indian team has been impressive both in batting and bowling.

The 16-year-old sensation Shafali Verma has been the standout batter with a whirlwind 17-ball 39 against Bangladesh, following her 29 against Australia.

One-down Jemimah Rodrigues has also been among the runs with 26 and 34 in the two matches so far.

Only captain Harmanpreet, among the top order batters, has not scored big and she is due big innings.

India is also likely to be bolstered by the return of star opener Smriti Mandhana who missed the match against Bangladesh due to fever.

The middle-order has also done its bit with Deepti Sharma playing a major role against Australia with an unbeaten 49 while Veda Krishnamurthy hit a match-defining 11-ball 20 not out for a late flourish against Bangladesh.

The bowling department has been led admirably by seasoned leg-spinner Poonam Yadav -- seven wickets in the first two matches -- with pacer Shikha Pandey ably supporting her with five scalps so far.

New Zealand, though, have a better head-to-head record against India in recent years, having won the last three matches between the two sides.

Exactly a year back, they had beaten the Indian team 3-0 in a three-match T20 International home series.

India will, however, remember their massive 34-run win against New Zealand in the previous edition of the T20 World Cup in 2018 in the West Indies. Harmanpreet had struck a memorable 103 to lead her side to victory.

New Zealand have some top-class players in their ranks in the form of captain and all-rounder Sophie Devine and top-order batswoman Suzie Bates while pacer Lea Tahuhu and leg-spinner Amelia Kerr will lead the bowling department.

They will go into this match on a high after an easy seven-wicket win over Sri Lanka on Saturday.

Devine had led her side from the front with an unbeaten 75 off 55 balls at the top of the order in that win.

The Teams:

India: Harmanpreet Kaur (capt), Smriti Mandhana, Jemimah Rodrigues, Deepti Sharma, Shafali Verma, Poonam Yadav, Radha Yadav, Taniya Bhatia (wk), Harleen Deol, Rajeshwari Gayakwad, Richa Ghosh, Veda Krishnamurthy, Shikha Pandey, Arundhati Reddy, Pooja Vastrakar.

New Zealand: Sophie Devine (capt), Rosemary Mair, Amelia Kerr, Suzie Bates, Lauren Down, Maddy Green, Holly Huddleston, Hayley Jensen, Leigh Kasperek, Jess Kerr, Katey Martin (wk), Katie Perkins, Anna Peterson, Rachel Priest, Lea Tahuhu.

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