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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February 3,2020

New Delhi, Feb 3: Former India cricketer Sanjay Manjrekar feels there are a lot of similarities between the Virat Kohli-led Team India and the Pakistan team when Imran Khan had led it as both captains instill strong self-belief in their respective teams.

Manjrekar also said that Pakistan under Imran had found different ways of winning matches even when it seemed all was lost.

"India under Virat in NZ reminds me of Pakistan under Imran. Strong self belief as a team. Pakistan under Imran found different ways of winning matches, often from losing positions. That only happens when the self belief is strong," Manjrekar tweeted.

The cricketer turned commentator expressed his opinion after India completed a rare 5-0 whitewash with a seven-run victory over New Zealand in the final T20 International in Mount Maunganui on Sunday.

Manjrekar also lauded KL Rahul, now also shouldering wicket-keeping duty, for his impressive showing in recent times.

"Samson & Pant... the next batting brigade of India obviously have the skill & the power game they just need to infuse a small dose of Virat's batting 'smarts' (mind) into their game," Manjrekar wrote.

The victory at the Bay Oval saw India stretch their record for most successive T20I wins.

This was their eighth win in a row, bettering the previous three instances when they won seven successive matches.

Kohli is the most successful Test captain in Indian cricket history, winning 11 consecutive series at home and are on top of the ICC rankings.

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June 24,2020

New Delhi, Jun 24: Former England skipper Michael Vaughan has slammed UK Prime Minister Boris Johnson for not allowing recreational cricket to resume.

UK Prime Minister Boris Johnson had described the cricket ball as a 'natural vector of disease' and ruled out recreational cricket's return in the country.

Hearing Johnson's argument, Vaughan tweeted: "Hand sanitiser in every players pocket. Use every time you touch the ball ... SIMPLE ... Recreational Cricket should just play from July 4th ... utter nonsense it's not being allowed back ... #Cricket."

Johnson was responding to a question from Conservative MP Greg Clark in the House of Commons, and it was then that Johnson said that it is too soon to lift current restrictions to allow the return of recreational cricket.

"The problem with cricket as everybody understands is that the ball is a natural vector of disease, potentially at any rate. We've been around it many times with our scientific friends," ESPNCricinfo had quoted Johnson as saying.

"At the moment, we're still working on ways to make cricket more COVID-secure but we can't change the guidance yet," he added.

Johnson had announced various relaxations on Tuesday, but the return of recreational cricket was not a part of them.

However, this statement given by Johnson will have no impact on the Test series between England and West Indies, scheduled to begin from July 8.

However, the England and Wales Cricket Board (ECB) has said that it is looking to resume recreational cricket in the country around July 4.

The board has also said that cricket is a low-risk sport as it is a non-contact sport.

"We believe that cricket is a non-contact sport, with very low risks of exposure, and that it can be played as safely as many other activities being currently permitted," the ECB said in an official statement.

"It is our strong desire to work with Government to see the return of recreational cricket on or around 4th July, as they continue to lift other restrictions more broadly across society," it added.

All international cricket has also been suspended since March due to the coronavirus pandemic.

However, it is set to resume to from July 8 as England and West Indies will lock horns in the three-Test series.

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January 22,2020

New Delhi, Jan 22: The pitches in New Zealand have become a lot more batting-friendly over the years, says iconic former batsman Sachin Tendulkar, insisting that India have the “ammunition” to trouble the sprightly hosts during the upcoming series.

Tendulkar, who has been on a record five New Zealand tours since 1990, feels that from seaming tracks during his early trips years, the tracks became high-scoring hard ones during his last tour back in 2009.

“Of late, the Tests in New Zealand have been high scoring and surfaces have changed,” Tendulkar told PTI during an exclusive interview.

India will play five T20 Internationals, three ODIs and two Tests during the tour starting with the shortest format on January 24.

From 2002, when India played ODIs and Tests on green tops, to 2009, when India won only their second Test series in 32 years, Tendulkar has seen it all in New Zealand.

“I remember when we played in 2009, the Hamilton pitch was different compared to other pitches. Other pitches got harder (Wellington and Napier) but not Hamilton. It remained soft.

“But Napier became hard with passage of time (where Gautam Gambhir scored an epic match-saving 12-hour hundred in 2009). So, from my first tour (in 1990 till 2009), I realised pitches got harder with passage of time,” Tendulkar said.

Tendulkar is confident that the Indian bowling attack, spearheaded by Jasprit Bumrah, has the ammunition to put New Zealand in trouble.

“We have a good bowling attack with quality fast bowlers as well as spinners. I believe we have the ammunition to compete in New Zealand.”

However, in Wellington, Tendulkar wants the team to be well-prepared to counter the breeze factor.

“Wellington, I have played and it makes a huge difference if you are bowling with the wind or against the wind. The batsman needs to be judicious in the choice of which end he wants to attack, it is very important,” he said.

Tendulkar said he would prefer spinners to bowl against the breeze.

“...the seamers bowling against the strong breeze need to be smart. So I would prefer that if there is strong breeze, let the spinner bowl from that end and from the opposite end, the fast bowler bowls with the breeze behind him,” he said.

The maestro is confident that Rohit Sharma's white ball experience will hold him in good stead in the Tests as well, an assignment that has been kept for the last leg of the trip, which begins with five T20 Internationals from January 24.

“The challenge would be to go out and open in different conditions. I think Rohit had opened in New Zealand in ODIs and has been there quite a few times, he knows the conditions well. Eventually, Test cricket is Test cricket,” he said.

“But all depends on surfaces that they provide. If they provide green tops, then it's a challenge.”

There is no Bhuvneshwar Kumar or Deepak Chahar in limited-overs series but Tendulkar is not ready to press the panic button.

“Injuries are part and parcel of the game when you play and push your body to the limits.

“When you play for your country you need to give your best and while you give your best, you can get injured. That's okay,” he concluded.

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