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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January 28,2020

Gibraltar, Jan 28: Young Indian Grand Master R Praggnanandhaa pulled off a huge upset, beating former world champion Veselin Topalov in the sixth round of the 18th Gibraltar chess festival to record his fifth straight win here.

The 14-year-old Chennai lad needed just 33 moves to put it across the Bulgarian. He had started with a loss against compatriot P V Nandhidhaa but since then he has been on a winning spree.

Praggnanandhaa, who recently won the world under-18 title, said: "It was very tough to prepare against him."

He is in second spot on five points with six other players and will take on Chinese GM Wang Hao in the seventh round.

Seventeen-year-old Russian GM Andrey Esipenko jumped to sole lead with 5.5 points with a win over Georgia's Ivan Cheparinov

The Russian player would be unpaired in the seventh round as he decided to take a bye.

A bunch of players including Indians — B Adhiban, K Sasikiran, Shardul Gagare, Karthikeyan Murali, SL Narayanan — are in joint third place with 4.5 points.

Adhiban beat Gabriel Flom, while D Gukesh, the world's second youngest Grand Master ever, defeated Martin Percivaldi to move to four points.

Also winning were Karthikeyan Murali against Qi B Chen and Gagare over France's Maxime Lagarde.

Top-seed Shakhriyar Mamedyarov's moderate run continued as he was held to a draw by GM Aryan Chopra.

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January 24,2020

Auckland, Jan 24: K L Rahul and Shreyas Iyer smashed quick-fire half-centuries, while skipper Virat Kohli made 45 as India defeated New Zealand by six wickets in the first T20 International to take a 1-0 lead in the five-match series here on Friday.

Chasing a challenging 204-run target, Rahul smashed 56 off 27 balls and together with Kohli shared 99 runs for the second wicket to lay the foundation for the chase.

Later, Iyer (58 not out off 29 balls) and Manish Pandey (14 not out) remained unbeaten as India chased down the target with an over to spare.

Earlier, Colin Munro, Kane Williamson and Ross Taylor smashed scintillating half-centuries to power New Zealand to a challenging 203 for five.

Opener Munro blasted six fours and two sixes in his 42-ball 59, while skipper Williamson treated the Indian bowlers with equal disdain, hitting them out of the park four times in his 26-ball 51.

Taylor then clobbered an unbeaten 54 off 27 balls. His innings was laced with three sixes and as many fours.

Opener Martin Guptill also chipped in with a 19-ball 30.

Earlier, India skipper Virat Kohli won the toss and decided to field.

For India, Jasprit Bumrah (1/), Shardul Thakur (1/44), Yuzvendra Chahal (1/32), Shivam Dube (1/24) and Ravindra Jadeja (1/18) snapped one wicket each.

Brief Score:

New Zealand: 203 for 5 in 20 overs (Colin Munro 59, Kane Williamson 51, Ross Taylor 54; Jasprit Bumrah 1/31).

India: 204 for 4 in 19 overs (Shreyas Iyer 58 not out, K L Rahul 56, Virat Kohli 45; Ish Sodhi 2/36).

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January 31,2020

Wellington, Jan 31: A nervous New Zealand threw it away yet again as a perseverant India prevailed in the Super Over for the second successive time to take a 4-0 lead in the T20 International series on Friday.

Needing just 11 runs off the last two overs with seven wickets in hand, New Zealand dug a hole for themselves yet again, taking the game to a Super Over two nights after doing the same in Hamilton.

New Zealand managed 13 runs in six balls and India got there effortlessly.

KL Rahul smashed 10 runs off the first two balls before he was caught. Then, a fired-up Virat Kohli and Sanju Samson finished the game in style.

Earlier, Manish Pandey proved his value to the team with an unbeaten 50 off 35 balls, taking India to 165 for eight from 88 for six in the 12th over.

India's total wasn't enough considering the batting-friendly conditions but the hosts made life a lot tougher for themselves from a commanding position before succumbing to pressure.

The entertaining knocks from Colin Munro (64 off 47) and Time Seifert went in vain (57 off 39).

Mohammed Shami, who was rested on Friday, had bowled a brilliant 20th over on Wednesday and man of the match Shardul Thakur was up to the task this time, conceding just six runs when the opposition needed seven for victory.

With the series already in the bag, India gave opportunity to Sanju Samson, Washington Sundar and Navdeep Saini for the first time in the five-match series, resting Rohit Sharma, Ravindra Jadeja and Shami. However, none of them was able to make an impact in the game.

Chasing 165, New Zealand lost Martin Guptill early. But Munro and Seifert put on 74 runs for the second wicket to put themselves on track.

Munro scored a half-century of 38 deliveries, inclusive of six fours and three sixes. He was out against the run of play as Kohli's direct hit surprisingly found the target after a relay throw from the deep.

It was the turning point as New Zealand lost regular wickets. Yuzvendra Chahal bowled Tom Bruce (0), but Seifert found a partner in Ross Taylor as they pushed the score past 150 in the 18th over.

Seifert scored a half-century off 32 balls, including four fours and three sixes. But the great choke was yet to come again. Needing 18 off 18, the Black Caps lost four wickets in the last over bowled by Thakur.

Taylor holed out of the first ball, while Seifert was run out two balls later. Daryl Mitchell (4) was caught next and Mitchell Santner (2) couldn't steal two runs off the last ball as the sides engaged in a tie-breaker for the second game running.

This was after New Zealand won a fourth consecutive toss and opted to field. Kane Williamson didn't take part in the match owing to a shoulder niggle.

Tim Southee was the stand-in skipper, with the Black Caps making two changes.

Put in to bat, the visitors were struggling at 88-6 at one stage before Pandey's lonesome rescue act took them to a respectable total. KL Rahul contributed 39 runs off 26 balls, inclusive of three sixes and two fours.

Leg spinner Ish Sodhi got into the act and ran through India's batting order. First to go was Shreyas Iyer (1) and then Shivam Dube (12) was caught at mid-wicket.

Sodhi finished with 3-26 while Santner dismissed Sundar for nought as the New Zealand spinners rounded up a good outing with 4-54 in eight overs.

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