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 25,2020

Bengaluru, Feb 25: India opening batsman KL Rahul will be available for Karnataka's Ranji Trophy semi-final clash against Bengal at the Eden Gardens in Kolkata on February 29.

Rahul had asked to be rested from Karnataka's quarter-final match but is now available for the climactic stages of the Ranji Trophy. 

Karnataka had already been strengthened by the addition of Manish Pandey for the quarter-finals, with both Pandey and Rahul having returned from New Zealand after India completed the limited-overs leg of their tour, ESPNcricinfo reported.

Last year's finalists Saurashtra will take on Gujarat in the other semi-final at Rajkot. The other prominent players who will be part of the last four include Parthiv Patel (Gujarat), Jaydev Unadkat (Saurashtra) and Manoj Tiwary (Bengal).

Gujarat, Bengal, Karnataka, and Saurashtra had finished on top of the combined Groups A and B table, and all four progressed to the semi-finals after dominating their respective quarter-final matches.

Rahul has been phenomenal with the bat in the limited-overs series against Australia and New Zealand. He scored one century and four fifty-plus scores in his last ten innings in ODIs and T20Is combined

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News Network
May 11,2020

Karachi, May 11: Pakistan might play more Test matches during their tour of England if it goes ahead as scheduled in July after the West Indies pulled out of an assignment there in June owing to the COVID-19 pandemic.

The Pakistan Cricket Board and the England and Wales Cricket Board officials are due to have a video conference on May 18 to discuss how they should proceed with the tour given the situation because of the pandemic.

"At present we have to play three Tests and three T20 internationals but the number of Tests could be increased and the tour could start a bit early in July," a PCB source said.

The source said that the ECB could offer to organise a four or five Test series against Pakistan if the West Indies tour didn’t go ahead.

Issues that are likely to be discussed in the May 18 meet are a quarantine period for Pakistani players when they arrive in England in July and limiting the venues for the matches and playing before empty stadiums.

PCB CEO Wasim Khan confirmed the video conference but said so far, the ECB has not spoken to them on increasing the number of matches on the tour which is scheduled between July and September.

"Things will be clear after the meeting but whatever decision we take we will consult our captains and head coaches before giving any confirmation," Khan said.

The PCB has so far kept mum on the chances of the series taking place in England because of the COVID-19 situation.

But with the British government due to announce measures to ease the lockdown in the country, it appears Pakistan could be touring on schedule.

Some former players have, however, asked the PCB to tread on the side of caution.

"If the West Indies have decided to postpone their series in June because of safety reasons and because of the situation then the PCB should also be very careful before taking up any offer from the ECB," a former captain said.

The West Indies Cricket Board said its players have to be convinced of their safety for it to commit to the assignment, which "is not possible in June."

"...we will continue our discussions with the ECB and other Internationals Boards on trying to find new dates," it said in a recent press release.

"We will only travel to England to play the series if our players can be assured that it is safe to do so," it added.

Pakistan is also scheduled to play an ODI series against Ireland while in UK but that series could be rescheduled and also be held in England.

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Agencies
May 26,2020

Some of the ICC guidelines on resumption of cricket border on the impractical and will need a review when the cricketing world is closer to action, feel former players Aakash Chopra, Irfan Pathan and Monty Panesar.

Last week, the International Cricket Council recommended a host of "back to cricket" guidelines including 14-day pre-match isolation training camps to ensure the teams are free from COVID-19.

The world body issued training as well as playing guidelines which will drastically change the way the game is played.

Among them are regular hand sanitising when in contact with the ball, no loo or shower breaks while training, minimising time spent in the changing room before and after a game, no use of saliva on ball and no handing over of personal items (cap, sunglasses, towels) to fellow teammates or the on-field umpires.

"Social distancing is very doable in individual sport but very tough in a team sport like cricket and football. If you need a slip during the game, would you not employ it?

"If the team is going through a 14-day quarantine and is being tested for COVID-19, I am fine with that process. Now, after that, if we have more guidelines for the players during the game, then you are making things complicated. Then there is no point of a quarantine period," former India pacer Pathan told PTI.

Safety cannot be compromised but regularly sanitising hands during the game will be too much to ask from the players.

"Safety is paramount but we should not make the game complicated. If a bowler or fielder has to sanitise hands every time he touches the ball, then it would be very difficult.

"You can shorten the process of giving the ball to the bowler. Instead of the usual chain (wicket-keeper to cover fielder to bowler), the keeper can straight away give the ball to the bowler but even then the bowler will have to sanitise hands six times in an over," said Pathan seeking more clarity on the guidelines.

Former India opener Chopra said it is still pre-mature to prepare a fixed set of guidelines for resumption of cricket as the situation is evolving "every day".

"That (regular hand sanitisation after contact with ball) is obviously impractical but my big question is when the game happens in a bio secure environment and everyone is quarantined and tested, do these additional measures make a difference?

"On the field, I can still understand but what happens when you go back into the dressing room? How do you practice social distancing there? So it becomes quite complicated.

"To be honest it is all very premature. Once they get closer to resumption, which will take some time, there will be more clarity," said Chopra.

International cricket is likely to resume in July with England hosting West Indies and then Pakistan.

Bundesliga football league has already begun in Germany behind closed doors and by the time cricket resumes, more sporting competitions would have restarted and Chopra feels that will help cricket decide the way forward in post COVID-19 times.

"By the time cricket resumes, more football would have started after Bundesliga. Cricket can take lessons from there, collect data and ideas and see what is practical and what is not."

Former England spinner Panesar foresees the start of the England-West Indies series making things a lot clearer for the entire fraternity than they are at the moment.

"The 14 day quarantine is very much needed and well done to the ICC for including that. I think we will see resumption of international cricket with England hosting West Indies in July. We might have some practical ideas then, the other countries would also be watching keenly and will learn how to go about it.

"But measures like regular hand sanitising is not going to be practical. May be you could sanitise every one hour but it can't be regular during the game," said Panesar.

While Pathan feels the on-field safety measures will make managing over-rate a bigger challenge for teams, Chopra said no loo or shower breaks during training won't be that much of an issue.

"Training is still controllable. You don't have to be there for a long time but you would still have to use the restroom at some stage. You may avoid taking a shower but you will have to use the restroom.

"I think the idea of these guidelines is to make cricketers more aware that you have to take care of yourself and inculcate habits which are in everyone's interest in the current scenario," added Chopra.

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