Category: Usain Bolt

Usain Bolt the eight time olympic gold medalist, eleven time world champion and the world’s fastest sprinter who have been likened as the legendary boxer Muhammad Ali in athletics is the only sprinter to have ever won the Olympic 100m, 200m and 4 x 100m relay gold medals for seven consecutive years, exempting the 2011 false start in the 100m.

Usain Bolt is a household name in many countries of the world having beaten much records in a lifetime than most athletes. After a hamstring injury during his last racing event everyone has been wondering what Bolt has been up to during his retirement. Here we will explore through his career, his relationships and what he does during his retirement.

Bio

Usain St Leo Bolt was born on the 21st of August 1986 at Sherwood Content, Jamaica to Wellesley Bolt and Jennifer Bolt. Usain Bolt attended Waldensia Primary and by the age of twelve, Usain had become the school’s best for the 100m race.Usain won his first annual high school championships medal in 2001where he took home the silver medal for the 200m race with a time record of 22.04 seconds.

Career

At the beginning, Bolt did not take sporting as an athlete seriously, he preferred playing crickets or football. His coach of his cricket team advised him to try out track sporting and he did. In the 2001 CARIFTA Games, Usain won a silver medal in both the 400m and 200m races with a record of 48.28s and 21.81s respectively.

His first appearance on the world stage was at the 2001 IAAF World Youth Championships in Debrecen , Hungary where he failed to qualify for the 200 m events finals. At the 2002 World Junior Championships Bolt won the 200 m race with a record of 20.61s, at fifeteen years he became the youngest world-junior gold medallist.

At the 2003 CARIFTA Games he won four golds and was awarded the Austin Sealy Trophy for the most outstanding athlete of the games. Usain will go on to set championship records in consecutive CARIFTA Games.Beginning with the CARIFTA Games in Bermuda in 2004, Bolt turned professional. He became the first junior sprinter to run 200m in 19.93 s.

After the 2007 Osaka World Championship, Usain took a more serious, more mature stance towards his career as an athlete, he continued to develop himself in the 100m event and on 3 May, 2008, Usain bolted with a record time of 9.76 s improving his personal best from 10.03 s. By 31st May, 2008, Usain set a new 100 m world record at the Reebok Grand Prix in the Icahn Stadium in New York City, he crossed the finish line at 9.72s. In the 100m finals of the 2008 Summer Olympics, Bolt broke his record again with 9.69s, in that Summer Olympics he also broke the record Michael Johnson held in the 200m race with a record time of 19.30s.

In the 2009 World Championship, bolt set a record of 9.58s winning his first gold medal in the World Championship, he also participated and won the 200 m finals with a 19.19s record.

Usain went on to break more grounds on the 100m, 200m and 4 x 100m relay track events. The Jamican retired as an athlete after the August 2017 World Championships in London, in the final race of his career he suffered a hamstring injury only few strides to the final homestretch of the 4 x 100 meter relay. Usain Bolt finshed that race helped by his teammates amidst cheers from fans.

Retirement, what he has been up to

Usain Bolt after his retirement did not consider a return to the game of athletics rather he tried out being a proffessional footballer after his heydays in athletics. He joined the Australian football club Central Coast Mariners in August, 2018 and left the team in November,2018 as the club could not afford paying him. Usain Bolt scored two goals already in a friendly match kickstarting his professional football career, each goal was celebrated with his ‘To Di World’ trademark lightening bolt pose.

Usain is currently trying out new business ventures, he cofounded a company in 2018, Bolt Mobility, a which company produces electric scooters and other mobility devices. In July and November 2019, Usain tried out being a music producer releasing tracks from Jamaican dancehall artistes.

Bolt is currently an ambassador of several international brands. Bolt has also supported athletes especially in his country.

Relationship – wife , girlfriend?

For a man as famous as Usain Bolt, a romance isn’t really private, he has since dated a list of girls and had flings with some. Girls who he had relationship with are Holly Young, Jady Duarte, Nailah Dillard, April Jackson, Megan Edwards, Taneish Simpson, Rebeckah Passley, Lubica Kucerova and Mizicann Evans.

The athlete was successful in hiding his relationship with Jamaican fashionista girlfriend Kasi Bennett for a very long time, currently they are planning to take their relationship to the next level of getting married and bearing children of their own.

Introduction

I was interested in the running race before even the calculus in out curriculum. I was watching the 2016 Olympic with my family, I was concentrating on the running race. In that Usain BOLT got the first place in the 100m. I knew that he is going to be a first place in the running race. But I asked one question that really Usain BOLT is the fastest runner or not. And my father said he is the fastest runner in the world. But actually we don’t know whether he is the fastest or in 100m alone, he is the fastest person. So I got interested in that topic. And I realize that to calculate the momentary acceleration, we need the calculus to find it. Therefore, I chose this topic as it has a link with calculus and while learning the concept I found it very interesting. Right from the beginning I wanted to do my IA related to sports. So I was trying to co-relate my IA with sports and calculus and I found that we can link calculus and running. Therefore, I decided to investigate the speed of different runners and prove that the runners are not running at a constant speed throughout the race. For this IA, I went through the calculus chapter in my textbook and additional book for higher level students from where I found there many formulas. Using this, I will be: “Determine the fastest runner in the world using the instantaneous velocity”

Background information

Calculus is one of the topic which branch of mathematics that involves the study of rates of change. Using this we can find the properties of derivatives and integrals of functions. There are 2 types of calculus, which is integral calculus and differential calculus. But in this IA, I am going to use only differential calculus. The basic formula for the calculus itself is: h0f(x+h) – f(x)h

This formula is to get the derivative of f(x). There are several number of calculus functions are there. To find out what if the functions are combine, multiply, divided or extras. In calculus, we also can see different types of formulas related to trigonometric. The equations for there are:

• ddxxn=nxn-1
• ddxg(f(x)) = g'(f(x))f'(x)
• ddx(ab)=a’b+ab’
• ddx(ab)=a’b-ab’b2

Experiments

To do this experiment, I would like to use the Olympic which happen in all around the world. I got the data from the videos and the website which written it down all about the timing and the distance that how much they run. So, to invest that the speed is not constant. I used the data for Olympic which conducted on 2016.

First I am going to measure the speed of the runner negligible the air resistance, using the distance which is 100m and time taken. And same for all the runners. They all did the running race for the same amount of distance so the numerator will be same for all the runners. But air resistance, the increasing in speed and the acceleration is present during the running race which is not include when I was calculating the average for each runners.

After I got that, I found that I have to think about those things when I want to find out the speed for one specific point. And I assume that the first 10m, the speed of Usain BOLT will be:

• time = 9.8110100=0.981s
• speed=100.98110.91m/s

But actually, in this the speed of each runners will be same for all the point. But there is no air resistance, acceleration and friction at all. So if I think about all of those. The speed will not constant for all point. So I found the instantaneous velocity for all the runners. So that my statement which is the speed is not constant during the running race.

Through this we can notice that all of the runners are not running in constant speed throughout the race. Instantaneous velocity is which the velocity of an object in motion at a particular point of time, so it can define as average velocity. To find the instantaneous velocity we have to get the slope of the distance and time graph. Through the table 1.2, we can clearly see the speed difference and the time difference. But still this is just rough sketch about it. So to get the exact speed.

This is the graph for the Usain BOLT. The gradient of the Usain BOLT’s graph will be the instantaneous velocity for the Usain BOLT. Using this graph, we can find the gradient and y-intercept to find the function for Usain BOLT: y=12.138x-23.291

I am going to do two more runners to prove my experiment. So it will be more provable. For that I am going to take a Andre DE GRASSE and Trayvon BROMELL.

In the 100m race, the Usain BOLT was faster than Andre DE GRASSE. But according to the function, Andre DE GRASSE’s initial speed was faster than Usain BOLT. At the 20m Andre DE GRASSE was faster than Usain BOLT, but there were not much difference in the timing for each 20m. The difference was reducing while they were doing the running race. At the beginning like, when they were in the 20m, the difference was 0.2s, till 60m, the difference was 0.2s. But at the 80m, the difference became 0.1 and finally at the 100m, Usain BOLT was 0.28s faster than Andre DE GRASSE. And through the function also the gradient is Andre DE GRASSE is larger than Usain BOLT. And when I plot the speed-time graph, I found that Andre DE GRASSE’s gradient was larger than Usain BOLT’s gradient. And when I extended the graph, the speed of Andre DE GRASSE was faster than Usain BOLT.

Now we can clearly see that the Andre DE GRASSE was faster than Usain BOLT. And through the data which I found it, I tried to get the average speed, time and acceleration. First I would like to calculate the average speed for both of them. For Usain BOLT and :

• Average speed(Usain BOLT)=5.88+7.55+8.57+9.09+10.195=8.256
• Average speed(Andre DE GRASSE)=5.56+7.41+8.33+8.99+10.095=8.074
• And for average time for both runners are:
• Average time(Usain BOLT)=3.4+5.3+7.0+8.8+9.815=6.862
• Average time(Andre DE GRASSE)=3.6+5.4+7.2+8.9+9.915=7.002
• Finally for average acceleration for both the runners are:
• Average acceleration(Usain BOLT)=8.2566.862=1.203
• Average acceleration(Andre DE GRASSE)=8.0747.002=1.153

There is not much difference between them. And if the race is goes on, Andre DE GRASSE will catch up the Usain BOLT. Through this we can notice that the Usain BOLT’s instantaneous velocity and acceleration is fastest but, if we see the average acceleration and velocity is not the fastest in the world.

Conclusion

Through this experiment, I wanted to check whether he is the fastest runner in the world or not. In 100m, through the result, we can clearly know that the Usain BOLT is the fastest in that. But, we are not sure about whether Usain BOLT is the fastest runner even if the distance of the running race is increasing. It could be the instantaneous acceleration of Usain BOLT might high, not the average acceleration. That is mean, the instantaneous velocity might be low. The difference between the Usain BOLT’s and Andre DE GRASSE’s speed is not much. That is mean if the distance is increasing, there is a possibility for Andre DE GRASSE to become a first place.

Bibliography

• https://www.olympic.org/rio-2016/athletics/100m-men
• https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-rates/v/usain-bolt-s-average-speed
• https://www.khanacademy.org/science/ap-physics-1/ap-one-dimensional-motion/instantaneous-velocity-and-speed/v/instantaneous-speed-and-velocity
• https://byjus.com/calculus-formulas/

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