Good Morning, students! ^^
Students: *busy chatting away*
My dear students~ Ohayou gozaimasu~
Students: *STILL busy chatting away*
KISAMA, I SAID GOOD MORNING BAKA AHOSHI, SHINITAI? D:<
Students: “AHHHH NOO GOMENASAI!” T>T
I’m glad that all of you treasure your lives. Now, if you don’t want to die running 100 rounds later, hurry up and get ready for PE (Physical Exercise) Lesson
Me: “So, can anyone guess why we are at the field today?”
Student (Esther): “To die running 100 rounds.”
Me: “No, it’s okay… let’s not do that today…” (-_-;)
Today, we are going to play a worldwide well-known sport, called soccer.
Student (Frank): “To be frank, it’s football, not soccer.”
Basically, in the past, there were two different sports: ‘Rugby Football’ and ‘Association Football’. To differentiate both, Brits shortened the former to ‘Rugby’, and the latter to ‘Soccer’. Gradually, the term ‘soccer’ increased in popularity and usage in the United States. Then, because it became too American-oriented, Brits decided to stop using the term and went back to using ‘football’. Thus, this resulted in an identity crisis of this sport today. ((Correct me if I am wrong ><))
Anyways, in my opinion, I believe that you can call the sport whatever you want, as long as you get the message across. Some examples include: ‘Panda ball’, ‘Zebra ball’, ‘multi-racial ball’, ‘tragic ball that always gets kicked around and bullied’, etc. Whatever floats your boat :3
In the midst of the game, due to several accidental fouls, a penalty kick was awarded.
Students: “Sugoi! How did you do that!”
Student (Gwyneth): “Hahaha I have no clue!” xD
Nice one, Gwyneth 🙂 This was called a curveball. In 1997, there was a similar free-kick by Brazilian football legend, Roberto Carlos, that left the entire audience dumbfounded. At that time, NO ONE HAS EVER DONE THAT IN THE HISTORY OF football.
((Comment below if you got that reference)) Anyways, refer to this website for more information about that kick which stunned the entire world.
Of course, Gwyneth is not a magician. Or at least I hope not. The Physics behind this queer phenomenon is called the Magnus Effect.
In short, the kick uses the inside of the foot to apply a spin on the ball, which generates a spinning air flow on the surface of the ball.
With incoming air flow, there will be one side whereby both air flow are in the same direction, thus the incoming air flow is accelerated and follows the air flow of the ball. But for the other side, both air flow are in the opposite direction, thus the incoming air flow is slowed and cannot continue to travel with the air flow of the ball.
Therefore, this creates a net force of the air flow to the right. Following Newton’s 3rd Law, the ball moves to the left. Also, as there will be a build-up of air on the right side, this region of higher pressure imparts a force on the ball, pushing it to the left.
For every action, there is an equal and opposite reaction.
As a result, although the ball was originally travelling to the right, due to Magnus Effect, it changes its trajectory halfway and begins to shift to the left.
This phenomenon has become one of the most crucial skills in football today, often being the determining factor between winning and losing.
Credits of pictures go to this video. For a clearer explanation, you can check out other websites and videos on the Magnus Effect.
In life, we frequently experience the Magnus Effect as well. Often, we face obstacles, temptations, likes and dislikes, that cause us to have a change in our life goals. Sometimes, it may help us to score a goal, but other times, it made us miss a shot.
As Friar Lawrence from the play ‘Romeo and Juliet’ once said,
Virtue itself turns vice, being misapplied,
And vice sometimes by action dignified.
Think carefully before making any decisions. Another quote from Friar Lawrence: “Wisely and slow. They stumble that run fast.” We are the player, and the ball is our fate. We can choose whether to impart a spin on the ball or not. We must understand when is the right time to do the right action, if not, it will only lead to failure. But remember, after you apply Magnus Effect, your fate will deviate from its original course, on to a new trajectory. From then onwards, you cannot rewind the effect and the only way is to move on with your new future.
Student (Huai Zhe): “You just took a boat on the surface of the water and made it so deep.”
Me: “Well… Whatever floats your boat~ Thank you, class!” :3
Students: *busy chatting away*
KISAMA, I SAID THANK YOU CLASS AND YOU GUYS IGNORED ME HUH, YOU GUYS WANT TO DIE IS IT? GO RUN 100 ROUNDS AROUND THE TRACK NOW! HAVE FUN DYING MUAHAHAHAHA BAKA AHOSHI POOP FACES ANNOYING LITTLE BRATS SERVES YOU DANG RIGHT FOR IGNORING YOUR AWESOME EPIC TEACHER HMMPH