Physics of Volleyball Essay Example for Free

Physics of Volleyball Essay Physics is the study of energy and how it is transferred from one particle to another. There is certainly a lot of energy transferred between objects and players in the sport of volleyball. A few of the concepts of physics that take place during volleyball include gravity, displacement, velocity, acceleration, projectile motion, and force. These concepts are displayed throughout the different positions on the court. There are three main aspects of volleyball that include physics, the first one being displacement. This happens when a player moves to their position on the court and when the ball moves from side to side. Displacement is relative to all positions on the court of volleyball because all six players should be evenly spaced on their respective side. Each player on the court is assigned one of the six positions. Even though theyre only assigned one position, they move and adjust to the play according to their teammates and the direction of the ball. Secondly, velocity is the speed of the player and ball. Velocity is commonly expressed as the change in displacement in a given time. One of these areas where velocity is found in volleyball would be when a player spikes the ball. With the proper velocity, the ball will hit the floor without a defender being able to react quickly enough to the attack. Thirdly, there is gravity, If there was no gravity the ball would not come down nor would the players. Gravity is essential to volleyball because without gravity the players would not be able to stay on the ground and enjoy the game. Also, the ball would float away from the people participating in the game. There are two major concepts of physics for serving, velocity and acceleration. As the ball’s velocity increases its distance also becomes greater. Since the ball is in constant acceleration, the velocity increases by the same amount of time. With the proper velocity, the ball will hit the floor without a defender being able to react quickly enough to the attack. Acceleration goes hand-in-hand with velocity. Acceleration is defined as the rate at which velocity changes. The ball, along with players on the court, both have acceleration. There are times in a volleyball game when the ball has constant acceleration, when the ball is served. When the ball is hit by a player for a spike, the rate at which it reaches is maximum velocity is the acceleration. In order to determine when to hit the ball, you need to calculate the trajectory, speed, and placement of the set. When approaching the ball, the body has kinetic energy and this energy turns into potential energy. This allows the player to jump higher. Since potential energy is the product of the mass of the player, gravity, and the height of the jump, the height is what determines how much potential energy will be attained. When the player hits the ball, it puts as much momentum into it as possible, the shorter amount of time the hand is in contact with the ball, the greater the momentum. Physics affects every aspect of the sport of volleyball from hitting, defense and serving. Without the concepts of physics that take place during volleyball include gravity, displacement, velocity, acceleration, and force, there would not be the sport. Understanding the physics behind the game can make someone a better player because they can learn how the game works and react to it accordingly.

Comparing Song of Roland, The Life Story of Pavlichenko, and The Prince :: Comparison Compare Contrast Essays

Comparing Song of Roland, The Life Story of Pavlichenko, and The Prince Abstract: By evaluating different approaches of rulers to their vassals, in The Song of Roland and The Life Story of Pavlichenko, Matvey Rodionych, it is shown that Machiavelli made a mistake when he came up with his general rule: â€Å"It is much safer to be feared than loved, if hi is to fail in one of the two.† (Machiavelli, 54). Darwin explained in his theory of natural selection, which primarily explains evolution, however also can be applied to any other situation in which sustainability is the primary concern as in ruler – vassal relationships, that only the strongest survived. Disregarding this fact Machiavelli came up with a false theory. Charlemagne is loved and succeeds, and only when hated he gets in danger. Nikitinsky is feared and dies. Both stories suit the condition of Machiavelli’s rule, and still it fails. When Darwin came up with his theory of natural selection, he explained why rulers, once they have acquired power, behave in a certain way that, to their belief, sustains their position. 1 Approximately 350 years earlier, Niccolà ² Machiavelli formulated a set of rules which was supposed to support rulers, in his case the prince of Milan, in doing so. One of his rules is: â€Å"It is much safer for a ruler to be feared than loved, if he is to fail in one of the two†(Machiavelli, 54). Juxtaposing The Song of Roland and The Life Story of Pavlichenko, Matvey Rodionych, two stories written on the bases of Ruler – Vassal relations, it becomes doubtful whether Machiavelli’s theory can be taken as cornerstone for any ruler’s principles. The theory of natural selection is widely accepted and will therefore be taken as fact in this argument. Darwin states in his theory that only the strongest survive. That suggests that a ruler’s position is only sustainable if he is stronger than his subjects and adversaries. Stronger in this case can be both, physically for example through armed forces or even physical strength, and psychologically for example through the use of superior rhetoric or wit. In most cases however, a combination of both will be necessary. In examining the relation of the ruler to his vassals, it is just as important to take into account other goals the ruler might have besides sustaining his position. His priority might also be the general well-being and the continuous development of his

Project Manager – Main Responsibilities

i) Project Manager – main responsibilities and desired traits Project manager has primary responsibilities for providing leadership in planning, organizing and controlling to the project team to accomplish the project objective in quality manner, within budget and on time as a cohesive group. [pic] Desired Traits Skills Effective project managers must posses a variety of skills in addition to general management skills.While certain necessary skills may be dependent upon the project, there are some skills that all project managers should possess. Leadership ability -create a vision an direction, inspiring the team, give empowerment, give motivations, appreciate and values the contribution by recognition, praise encouragement, establishing an environment of trust, high expectations and enjoyment.Ability to develop people – has a commitment to the training and development of people working on the project. Give the team an opportunity to add value from experience by gaining knowledge and more competent. Communication skills – the ability to communicate clearly, effectively, and regularly for the purpose of to have a good working relationship with the project team, customers and other stakeholders.Interpersonal skills- the ability to develop a relationship with each team member in order to know â€Å"what motivates them, how they think things are going, what concerns they have, and how they feel about things† Problem-Solving – the ability to anticipate problems, recognize them when they arise, and solve them quickly and efficiently Time Management – the ability to prioritize, delegate, and manage time effectively Ability to handle stress – the ability to handle stress that can arise from work situation.Negotiating Skills – able to interact with customers, sponsor, the project organization’s management, subcontractors, vendors and end user to arrive at a mutually acceptable agreement on an issue. Conclusi on The project manager responsibilities of planning, organizing, and controlling are general management responsibilities. In addition to these responsibilities, the effective project manager must possess a specific set of skills that can be used to manage projects successfully. ———————– PROJECT MANAGER

Testing Approach And Overall Framework - 1653 Words

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