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Usain Bolt Velocity & Speed - Physics

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Who Is Usain Bolt?
Jamaican sprinter Usain Bolt (born August 21, 1986) is
arguably the fastest man in the world, winning three
gold medals at the 2008 Olympic Games in Beijing,
China, and becoming the first man in Olympic history
to win both the 100-meter and 200-meter races in
record times.
Olympic Career
At the 2008 Beijing Summer Olympics, Bolt ran the
100-meter and 200-meter events. In the 100-meter
final leading up to the Games, he broke the world
record, winning in 9.69 seconds. Not only was the
record set without a favorable wind, but he also visibly
slowed down to celebrate before he finished (and his
shoelace was untied), an act that aroused much
controversy later on. He went on to win three gold
medals and break three world records in Beijing.
At the 2012 Summer Olympic Games, held in London,
Bolt won his fourth Olympic gold medal in the men's
100-meter race, beating rival Yohan Blake, who won
silver in the event. Bolt ran the race in 9.63 seconds, a new Olympic record. The win marked Bolt's
second consecutive gold medal in the 100. He went on to compete in the men's 200, claiming his second
consecutive gold medal in that race. He is the first man to win both the 100 and 200 in consecutive
Olympic Games, as well as the first man to ever win back-to-back gold medals in double sprints. Bolt's
accomplishments have made him the first man in history to set three world records in a single Olympic
Games competition.
In the 2009 Beijing Olympics what was Bolt’s average speed?
In the 2012 London Olympic what was Bolt’s average speed?
Usain Bolt ran the world’s fastest 100 meter sprint, crossing the finish line in just 9.69 seconds. Usain ran
the first 10 meters of the race in 1.83 seconds. It took Usain .82 seconds to cross from the 70 meter
mark to the 80 meter mark. What was Bolt’s instantaneous velocity during those two sections?
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