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Physics everywhere
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Rolling Motion and Friction
Suppose you kick a soccer ball without giving it any spin. Your foot, therefore, gives the ball an initial speed (v) and an initial angular speed of 0. Since grass is not frictionless, the ball initially slides across the field, then starts to rotate and, eventually, starts rolling without slipping. A soccer ball rolls without slipping when its center-of-mass speed equals its angular speed (around its center of mass). OK, now suppose you want to kick the ball so that it immediately starts rolling without slipping. How? You would give the ball "topspin" by striking the ball a distance (s) above an imaginary horizontal line that passes through the ball's center. But where? ANSWER: s=0.4R. You would strike the ball a little less than half the radius of the ball above its center line.
When two objects slide across one another, they exert a frictional force against each other. These forces are always tangent to the surfaces. A soccer ball and its interaction with the field is an example of this. The frictional force is opposite the direction that the ball is traveling. Physics gives us the following equation: f=mN for objects that slide against one another; where the frictional force (f) is equal to the upward "normal force" that the surface exerts on the ball (N) multiplied by the coefficient of friction (m). The coefficient of friction is not a constant, but will vary with the ball and surface type. The more friction there is between the ball and the field, the slower the ball will move after a bounce. Balls that skid, on the other hand, do not generate as much friction and subsequently do not slow down as much. So, the coefficient of friction tells us how fast (or slow) a ball will travel: The higher the coefficient, the slower the ball. A device similar to the Stimpmeter®, which is used to measure the "speed" of a golf green, could measure a soccer field's coefficient of friction by rolling a small ball on grass and measuring the distance it travels before stopping.
Projectile Motion
When projectile motion is treated in basic physics courses, the influence of air resistance is often neglected in the calculations and the trajectory of a projectile becomes a parabola where the horizontal velocity component is contant and the vertical component is subject to gravity. However, for someone watching a game of soccer, it is clear that the motion of a soccer ball is governed not only by gravity, but also by air resistance.
Ever since I was little I was amazed at the ability for a machine to fly. I have always wanted to explore ideas of flight and be able to actually fly. I think I may have found my childhood fantasy in the world of aeronautical engineering. The object of my paper is to give me more insight on my future career as an aeronautical engineer. This paper was also to give me ideas of the physics of flight and be to apply those physics of flight to compete in a high school competition.
The effect of air resistance on the ball would only be minor, but would need a lot of calculations which is why it was left out. We are also going to assume that there is no “curl”, or “bend” on the ball. Using the technique of bending the ball changes the straight line path of the ball making it hard to calculate. Also, we assume that the preparation leading up to the kick is perfect, and that there will be no errors in the initial shooting velocity. There is no error in the initial shooting velocity.
Soccer is a game that is played a lot on angles and measurements. Most wouldn’t think that angles come into play when playing soccer, they just kick it into the goal wherever they can. To make a good, precise shot, you must take into account where you are in relation to the goal, and decide what angle would be the best to aim and kick for. Where the kicker is standing in correlation to the goal plays a major factor on the difficulty of the shot. Also, if the kicker is a left or right footed kicker and what side of the goal they are on also plays an important factor...
This investigation was conducted to determine if different soccer ball sizes affected the distance each soccer ball would travel when kicked. The hypothesis was that If the sizes of the soccer ball are changed, then the ball with the smallest size will go the farthest because, it has less air and weighs less than larger soccer balls. The results of this investigation did not support the hypothesis. The size 4 ball travelled the greatest distance compared to the largest and smaller soccer balls.
Physics is everywhere. Consequently, physics is a part of sports and more specifically, hockey. As the scientific discoveries progressed with time, so did the advancements in the sport of hockey, reflecting on how important and influential science truly is. Physics takes part in the ice, the skates, the protective gear, the shots, goaltending, and all other aspects of ice hockey.
First off, when kicking a football, you have to factor in several things. You need to know what the distance is from the spot of the ball to the field goal and what direction you’re kicking the ball. You also have to factor in the direction the wind and how fast the wind is blowing. If the wind is blowing towards the field goal post, it will most likely increase the distance it will travel. If the wind is blowing away from the field goal post, the distance you can make a field goal will decrease.
There are three main energy systems used in a game of touch football which consist of the creatine phosphate (ATP PC) system, lactic acid system and the aerobic system. Each system plays a vital role during game play. Every muscle in your body requires energy to perform all movements, and to do this, the energy is produced by the breakdown of a molecule called adenosine triphosphate (ATP). ATP is found in all cells which is a chemical form of muscular activity and performs mostly all functions in the human body. It contains 3 phosphate groups and adenosine. ATP is stored in the muscles and lasts for approximately 10-30 seconds. Carbohydrates, fats and proteins, are all producers of ATP from the food we eat; however Creatine Phosphate is also a high energy compound producer found in the cells. These three chemical reactions are conducted to continue muscular work. The first system used in a game of touch football is the ATP PC system. This system is stored into the muscles and used in short durations for up to 10 seconds and doesn’t not require oxygen therefore being anaerobic. ATP lasts approximately 3 seconds, and then Creatine phosphate (CP) will continue until all ATP PC energy is used up. The use of ATP is high intensity and would usually be used in a 50m sprint or a pass in touch. Once the CP energy is used up the body then switches to the lactic acid system. This is because of the breakdown of glucose, resulting in the production of lactic acid. The lactic acid system an anaerobic energy system, which lasts for approximately 30 seconds to 2 minutes, and is the conversion of glycogen to glucose. In relation to a game of touch football, the lactic acid system could be used during a quick wruck, as the movements required are a...
Soccer is the worlds most popular sport. It is the national sport of most European and Latin-American countries, and of many other nations. Millions of people in more than 140 countries play soccer. The World Cup is held every four years. Soccer is one of the most famous international sports. Soccer is known world wide and is played in the Olympics.
The first law of Newton’s Laws is inertia. The basic definition of inertia is an object in motion will stay in motion until acted on by an outside force, as well as an object as rest will stay at rest until acted on by an outside force (Serwalt, R. & Faughn, J). This law applies to just about every move in the game of lacrosse. When a player picks up the ball in their stick, before they start to move, the ball is at rest, but once the player begins to move and cradle the ball, the ball is now in motion. The only way to stop the motion of the ball is if the player decides to stop moving and try to waste time. This would be called as a stall in the game, and causes a turn over. A good example of the ball staying in motion until acted on is when the goalie has the ball and begins to clear. A “clear” is when the goalie has possession of the ball and is looking for a player from the team to pass to, to get the ball out of the defensive zone into the other teams defensive zone (NCAA Men’s Lacrosse Rule Book, 2014) . When the goalie clears the ball it has to be a long pass. A good goalie can clear the ball the length of half of a football field, and if the pass is to high to the teammate to catch then the ball will be acted on by the force of gravity and the ground which causes the ball the ...
This investigation aims to determine the ideal air pressure inside and the ideal material of a ball in order for that ball to achieve its greatest bounce height. This report will be focusing on how the air pressure and material of a soccer ball, basketball and volleyball affects the bounce height of each ball.
The surface of the marble affects the amount of friction, which affects the speed and distance the ball rolls. The surface of the floor also affects the amount of friction, which affects the speed and distance the ball rolls.
speed of the ball rolling down a ramp. From the data that I'm going to
As mentioned, soccer is the most popular sport on earth and has a rich history. There is evidence that a couple thousand years ago, people were playing a game similar to soccer. The modern game, played today in America, was not developed until 1863 when the original rules of no tripping and no hand balls were developed. The game started in the public school grounds of England but the basics of kicking a ball around were found in a Chinese military instruction piece estimated second or third BC. The form of football was called, “Tsu Chu”. Tsu Chu had the original concept of kicking a ball through a target, but while the soldier was being attacked by his fellow soldiers. During the Han Dynasty, the ball was made of leather and filled with feathers and the use of hands was not permitted “FIFA”.
There are many aspects to the game of basketball and physics can be applied to all of them. Although to be good at basketball it is not necessary to play it from a physics point of view. Basketball players become good by developing muscle memory for the actions that must be performed in the game of basketball from years of practice. Nevertheless knowing some of the physics in the game of basketball can help a good player be a better player. In this paper I will cover the three most important aspects of the game, shooting, dribbling and passing.
In this assessment of the projectile motion of an object, I found that it can be applied to many useful situations in our daily lives. There are many different equations and theorems to apply to an object in motion to either find the path of motion, the displacement, velocity, acceleration, and time of the object in the air.