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# Soccer Science Essay

1515 words - 7 pages

Soccer is my favorite sport. Soccer is a sport played between two teams of eleven players with a circle shaped ball. This game is played on a rectangle shaped field with a goal at each end. The object of the game is to score by using any part of the body (besides arms and hands) to get the soccer ball into the opposing goal. There are so many things that go into making a soccer game function. Science, math, and many other things help this game run properly.
Weight and mass play a big part in soccer. Weight is a force that is always directed towards the center of the earth. The weight of an average MLS (major league soccer) ball is about one pound. If the ball weighs ...view middle of the document...

To find the momentum you multiply the velocity of the object by the object's mass. When players pass the ball they use their feet to slow the momentum of the ball. When they do this they gain more control over the ball.
The Magnus effect is when the players curve the ball. A soccer ball is basically a flying projectile with initial velocity. To get the ball to curve the kicker has to hit the ball at a very precise angle and velocity. Once the ball is in the air the air kind of takes over. On a normal kick the players add spin to it for little air resistance. But, for the ball to curve the air needs to resist the ball. So, the less spin there is the more resistance there is and, the more the ball will curve. When the air bends the ball it tricks the goalie to think it's going to be in one place but ends up in another. According to Bernoulli’s principles, the air travels faster relative to the center of the ball where the periphery of the ball is moving in the same direction as the air flow. This reduces the pressure.The pressure increases on the other side of the ball, where the air travels slower relative to the center of the ball. There is an imbalance in the forces, and the ball deflects in the same sense as a spin. A normal kick travels about 65 mph and does about 10 revolutions per second. Once the ball travels about 10 meters the ball’s speed slows down and drag dramatically increases. After the ball’s velocity drops, the Magnus effect will start to kick in. When a ball spins through a fluid matter, it creates a barrier. That barrier is kind of like a force field. That effect will make the ball fly right into the goal!
Two of the top ball “curvers” are David Beckham and Roberto Carlos. Roberto is known for making the “impossible goal”. When Roberto kicked the ball it was so far to the right that one of the ball boys ducked because he thought it was going to hit him. In the middle of the ball’s flight the ball curved and landed right in the goal. So, Roberto’s kicks curve after they’ve been going straight. Beckham’s kicks are a subtle curve. He is better at corner kicks. He just ever so slightly gives the ball a slight turn that always got past the goalie. Both of those soccer players have mastered curving soccer
If the ball is kicked over the touch-line, it is put back into play with a throw-in. There are many physics concepts that can be applied to a throw-in. The first concept is projectile motion. Projectile motion is the path, or trajectory an object takes that is put into linear motion by a force. When you do a throw-in, you don't throw the ball parallel to the ground, but at an angle. You do that to get more distance. That's because there's another force acting on the ball. This force is called gravity. Gravity is an attractive field force between any two objects of mass. Because of gravity, the ball falls back down to the ground, as opposed to flying off into space. The Earth pulling...

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