# The Captain Tsubasa (& Soccer!) Physics

Captain Tsubasa (& Soccer!) Physics

Captain Tsubasa ( キャプテン翼, Kyaputen Tsubasa, also known as Flash Kicker or Holly & Benji )

Tsubasa Ozora is a young Japanese Elementary school student who is deeply in love with soccer and dreams of one day winning the FIFA World Cup for Japan. He lives togetherwith his mother in Japan, while his father is a seafaring captain who travels around the world.

Tsubasa Ozora’s motto of “The ball is my friend”. Ever since he was little, he always went out with a soccer ball. His mother now having concluded that he was indeed born only to play soccer.

At the beginning of the story, both of them move to the city of Nankatsu, a town well-known for their talented high school soccer teams, and where Tsubasa meets Ryo Ishizaki(Bruce Harper), who often sneaks out from his mother’s public bathrooms, Sanae Nakazawa (also known as Patty ), his future wife, a young girl who also loves soccer and helps cheer the Nankatsu High team ( NewTeam ) on, and Genzo Wakabayashi( aka Benjamin Price), a highly talented young goalkeeper. Tsubasa meets Roberto Hongo, one of the best Brazilian soccer players, who is a friend of Tsubasa’s father, and who arrives in Japan and starts living with Tsubasa and his mother. Roberto becomes a mentor to Tsubasa and helps him to harness his soccer skills, convincing him to join Nankatsu Elementary and its fledgling high school soccer team, which Roberto coaches later as he passes his techniques onto Tsubasa.

Tsubasa also meets Taro Misaki (Tom Becker), who has travelled around Japan and
soon joins Nankatsu, and the two become the best of friends, forming a partnership soon to be renowned as the “Golden Duo” or “dynamic duo” of Nankatsu.

He meets such talented players as Kojiro Hyuga (Mark Landers), Jun Misugi(Julian Ross), and many others. His Nankatsu team wins the U-16 World Championships for Japan, before leaving the country to play in Brazil.

### World Youth

Tsubasa starts playing, with his mentor Roberto as the manager, for São Paulo, in Brazil’s premier professional league, winning the final against Flamengo.

While Tsubasa moves from São Paulo to Barcelona, Kojiro Hyuga is bought by Juventus (F.C. Piemonte in the anime). Tsubasa plays very well in training, displaying all his skills, but the Dutch coach Van Saal, who coached Barcelona at the time) demotes him to FC Barcelona, the reserve team that plays in the second division, because Tsubasa and Rivaul cannot play together whilst Rivaul holds a key position for playmaking.

And the Physics?

What’s the lenght of Captain Tsubasa’s pitch?

How fast do Tsubasa & Co. run?

These calculations are not extraordinarily difficult: in other words, what I have done to find these values is pure and simple analysis.

You can find answers to these questions in my book, published through Amazon’s KDP:

“The Physics of…” on Amazon

Many people have a deep fear of Physics.

The fear of Physics may not seem as scary as a fear of darkness. There are many reasons why people develop a fear of Maths and Physics.
Maths and Physics have a similar image to that of cabbages, in that you are not supposed to like them and if you do, people think you are strange. We are taught directly or indirectly by relatives and the media that Physics is very hard: no-one can do Physics well; no-one likes Physics. Because of all this, Physics has been put on a pedestal as ‘very hard’ subject: If you can do it, you are revered as some kind of genius.
Students find Physics difficult, because they have to contend with different representations such as formulas and calculations, experiments, tables of numbers, graphs, diagrams and maps.
People think that Physics has too many things to learn: too much theory; too many formulas; too many laws and rules to be learned.
People also find that Physics is not interesting ( … seriously?!) and that makes it difficult for students.
In this book, I wanted to prove that Physics could be interesting: you can learn laws and rules with such enjoyment that you don’t notice that time passes!

I hope you will enjoy reading this book!

1. 8caratteri says:

HI IM NOT A PHYSICIST. I wonder if there is an explanation for the “fact” that the ball becomes an oval when it is kicked … ?

1. When something, for example a ball, moves through the air, you know that the air pushes back on it with a force called “air resistance”. Air resistance always pushes in the opposite direction to the way the object is moving. The air resistance pushing back on an object can be changed by changing the shape of the object. When you kick a soccer ball, your leg is putting kinetic energy into the ball. So you have this formula:

KE= $latex \frac{1}{2}mv^2$

But the side of the ball, when your foot strikes it, becomes flat ( think about an inelastic collision):

the energy coming out is the kinetic energy plus heat. Thanks to conservation of energy, ball goes faster. The velocity of the ball is:

$latex v_b= V_(leg) \frac{M_(leg)}{M_(leg)+m_b}(1+e)$

e is called the coefficient of restitution.
Now, when a ball moves into the air, air moves over the ball!
The air will move more quickly, making less pressure on one side of the ball. Remember: faster speed of air lower pressure. On the other side, the air moves more slowly; the spin is going against the flow of the air. There is more pressure on this side of the ball. The ball seems to be curve, because it is pushed in the direction from high pressure to low pressure. This physical phenomenon is called “Magnus effect”.

When the ball is heated to higher temperatures the bounce will increase, as the air particles in the ball will have more kinetic energy. When the air particles inside the ball
have more energy they are moving faster and have more collisions with themselves and the inside surface of the ball. There is more pressure inside the ball at HIGHER temperatures.
When something is elevated off a surface, it has gravitational potential energy and when it is released this gravitational potential energy is transferred into kinetic energy.

E=½mv²= mgh.

The ball is an elastic solid: it returns to its original shape after a deforming force is removed. It deforms when it hits the floor: energy is converted into heat energy during the
collision so there is less energy to bounce back up. A moving particle of gas inside the ball collides with the outer surface. We know that : Pressure = Force / Area.
When the ball hits the floor this Kinetic energy transforms into deformation energy, sound energy, heat energy and the rest is Kinetic energy going
upwards. If V is a constant the P/T will be constant, where V being its volume, P its pressure and T the temperature.

Is it ok? What have you been thinking?