Physics behind Soccer
When a soccer player kicks a ball off-center it causes the ball to spin. The direction and speed of the spin will determine how much the ball curves during flight. It's the same principle as a curve ball in baseball. When throwing the ball, the pitcher makes a fast spin which causes the ball to curve during flight. As the ball spins, friction between the ball and air causes the air to react to the direction of spin of the ball.
As the ball undergoes top-spin it causes the velocity of the air around the top half of the ball to become less than the air velocity around the bottom half of the ball. This is because the tangential velocity of the ball in the top half acts in the opposite direction to the airflow, and the tangential velocity of the ball in the bottom half acts in the same direction as the airflow. The airflow is in the leftward direction, relative to the ball.
Since the (resultant) air speed around the top half of the ball is less than the air speed around the bottom half of the ball, the pressure is greater on the top of the ball. This causes a net downward force (F) to act on the ball. This is due to Bernoulli's principle which states that when air velocity decreases, air pressure increases (and vice-versa).
In 1997, Brazilian player Roberto Carlos rendered a French keeper stunned and speechless after curving a 30 meter strike off the post and into the goal. The Magnus effect explains how projectiles can curve when moving through a fluid (like air). Whenever a ball is spinning through the air, the Magnus "force" will push it in a direction perpendicular to the direction of movement. After Carlos sent the ball flying, the airflow started pushing against the ball in the direction of Carlos. This means that the side of the ball spinning toward Carlos would move with the airflow while the opposite side would move against it. This imbalance is the key to the Magnus effect. The airflow moving with the
Related Documents: Physics in Soccer Essay example
acceptable in order to have power, power that enables you to stand out, to never be judged in this socially constructed society. I’m a 6’2ft, 197 pounds Colombian with a BMI of 19.2, I work out 4 days a week and box 2 days a week, I play in a men’s soccer league and in my free time (aside from studying) I like to skateboard, snowboard and swim, so I can pretty much say I’m an active guy, and with physical activity comes good health, I’ve never broken a bone in my life and the last time I was at a hospital…
Now that I’m thinking about it I do get what the main points about the project were and of how they work. That project, science fair project, was able to get me 1st place in the science fair. I now know a lot more about circuits because of my AP Physics class. If not for my prior experiences with circuits, I would’ve had more trouble with understanding circuits. In middle school I didn’t really have any influential adults in my life except for my parents. I know they went through a lot during middle…
Administration 25A Primary N Transfer Stop Irving College Gray College Stony Brook Union Campus Recreation Center P Physics Simons Center Service Group P P Central Services (Receiving) CoGen Plant lly Mendelsohn Quad P Sports Complex Central Stores (Warehouse) O’Neill College Ammann College Outdoor Basketball Courts P James College Student Health Center 25A Soccer Practice Field SBU Transit Stop with Suffolk Transit Connection Benedict College H Quad Lacrosse Practice Field…
silver glint of a retainer: Andraka grins. Since he won the $75,000 grand prize at this past spring’s Intel International Science and Engineering Fair, one of the few freshman ever to do so, he’s become a North County High School celebrity to rival any soccer star or homecoming queen. A series of jokes ensue about Andraka’s mad scientist doings in the school’s imaginary “dungeon” laboratory. In reality, Andraka created his potentially revolutionary pancreatic cancer detection tool at nearby Johns Hopkins…
and the level of education as well. I would like to get my Associates Degree and transfer to a four year University to continue my education. I went through a lot of obstacles to be where I am right now, during my senior year while in my school soccer playoffs I suffered a concussion due to a knee to the side of my head during a corner-kick that put me straight in the hospital for almost two months and it was really hard for me because during that period of time all I did was lay down in bed in…
student needs to take: • Two semesters of English • Two semesters of College Mathematics • Two semesters of General Biology with Lab • Two semesters of General Chemistry with Lab • Two semesters of Organic Chemistry with Lab • Two semesters of Physics with Lab • One semester of Biochemistry There are also some recommended courses. They are: • Physiology • Genetics • Cellular and Molecular Biology • Microbiology • Psychology Computer Requirements At the University of Miami, having a personal…
came to women such as higher graduation rates, fairness in admissions & finical aid, receive scholarships, better health, acceptance & separate programs for pregnant or parenting students, upper level math & science majors (AP Calculus up 6% and AP Physics up 10%). Title IX was designed to end discrimination against women, but at the time was discriminating men for example, in 1997 Boston University dropped its football program due to Title IX pressures after 91 years, UCLA dropped its swimming and…
Practice test Four In my many years of experience in school, I've learned that most teachers tend to create an environment that is most comfortable for child to learn, explore, and discover new ideas and concepts. On the other hand, other teachers tend to create an environment where they drill information into a student's head; these kinds of teachers are only putting information in a child's head for a certain period of time, instead of a lifetime. Yet I have discovered that teachers like…
minutes of moderate to vigorous activity must be accumulated daily. Activities that stimulate development in this area are walking, jogging, biking, rope jumping, aerobic dance, swimming, and a team sports such as Basketball, Ultimate Frisbee, and Soccer. Body Composition Body composition is the proportion of body fat to lean body mass. National Institute of Health recommends that a healthy adult male's body should have between 6 and 24 percent fat and a female should have 14-31%. Athletes, leaner…
Are We Actually Training For Speed? Speed is often misconceptualized by many coaches and performers meaning that the way we train for speed is not as efficient as it could be, with a focus on stride frequency and stride length, rather than ground reaction force. In this essay I plan to briefly breakdown the sport (100m sprint), and then look into what we should be training for the sport, and how we should be doing this. This will allow misunderstood coaches and performers to adapt their training…
