Physics of Football Essay -- physics sport sports american football

Watching a weekend football game could be teaching you something other than who threw the most passes or gained the most yards. Football provides some great examples of the basic concepts of physics! Physics is present in the flight of the ball, the motion of the players, and the force of the tackles. This web page will show you how physics applies to these areas of football. What Exactly Is Physics and What Does It Have to Do with Football? When you throw a football across the yard to your friend, you are using physics. You make adjustments for all the factors, such as distance, wind and the weight of the ball. The farther away your friend is, the harder you have to throw the ball, or the steeper the angle of your throw. This adjustment is done in your head, and it's physics. Physics is the branch of science that deals with the physical world. The area of physics that is most relevant to football is mechanics, the study of motion and its causes. The three main categories of motion that apply to the game are: * delivery of a football through the air (pass, punt, kickoff, field goal, extra point) * runners on the field (backs, receivers, linemen) * stopping runners on the field (tackling, blocking) FLIGHT OF THE BALL When the football travels through the air (long pass, punt, kickoff, field goal), it always follows a curved, or parabolic, path because the movement of the ball in the vertical direction is influenced by the force of gravity As the ball travels up, gravity slows it down until it stops briefly at its peak height, the ball then comes down, and gravity accelerates it until it hits the ground. This... ... the amount of force applied: Less force is required farther out from the center of mass than closer in. So, by tackling a runner low -- far from the center of mass -- it takes less force to tackle him than if he were tackled high. Also, if a runner is hit exactly at his center of mass, he will not rotate, but instead will be driven in the direction of the tackle. Similarly, coaches often advise linemen to stay low. This brings their center of mass closer to the ground, so an opposing player, no matter how low he goes, can only contact them near their center of mass. This makes it difficult for an opposing player to move them, because they will not rotate upon contact. This technique is critical for a defensive lineman in defending his own goal in the "red" zone, the last 10 yards before the goal line.

Main Divisions Within the Democrat Party Essay

There have always been different divisions within the Democrat Party and it has historically been factionalised into two main groups (as seen in the New Deal Coalition). There is the southern conservative wing, made up of Democrats from southern states who hold conservative views on issues including social and economic issues. These Democrats are seldom reliable voters in Congress, often voting with the Republicans on fiscal issues e.g. in 2009 some Blue Dog Democrats voted against Obama’s fiscal stimulus package. The second key factions within the Democrat Party is the north eastern liberal wing made up of Democrats from the West Coast and north eastern states. This division is the division that alienated the traditional Democrat voters from the south during the break up on the ‘solid south’ after the north eastern liberals supports the Civil Rights Movement. President Obama, when first elected in 2008, was the first northeaster liberal to become President since President Kennedy in 1960. In the 1980’s a new division within the Democrat Party emerged with the development of the ‘New Democrats’, mainly associated with President Clinton, Al Gore and the Democratic Leadership Council who developed due to their acknowledgment of the need to triangulate to improve the Democrat’s chances of winning the presidency. New Democrats are centrists sometimes known as the ‘Third Way’ and hold more moderate social positions and have neo-liberal fiscal values, shown by Clinton’s repeal of the Glass Steagall Act 1999. Overall there are two historic divisions within the Democrat Party; the north eastern liberals and the southern conservative Democrats, though recent decades have seen the emergence of a third division; the New Democrats.

Florence Nightingale Quotes From The Nursing Pioneer

A pioneer in the nursing field, Florence Nightingale established herself as a competent nursing administrator during the Crimean War, where her insistence on sanitary conditions cut the death rate considerably. She continued to advance the field in her later years, providing better health service and opportunities for women at the same time. Born into an upper-class British family in 1820, Florence had an unusually liberal upbringing, with both her parents interested in humanitarian causes; her grandfather had been a prominent abolitionist. Despite this, even their outlook had its limits: they were horrified when Florence, as a young woman, declared that she intended to become a nurse and believed she was called to do so by God. Nevertheless, she pursued her education, rebelling against societal expectations that she would become a wife and mother and instead devoting her life to her career. Florence traveled extensively throughout Europe and even went as far as Egypt; she later published many of her writings from this era. Eventually, she returned to London and became the superintendent at the Institute for the Care of Sick Gentlewomen. It was in 1854 that her career changed forever, when word got to England about the horrific conditions in hospitals in the Ottoman Empire during the Crimean War. The unsanitary medical conditions were causing more deaths than the injuries warranted, but under Florences hygiene guidance - and her pleas sent back to England for government assistance to improve conditions - the death rate plummeted from 42% to approximately 2%. After the war, she returned to Britain, where she received funds to start a nursing school. She also wrote Notes on Nursing, a seminal text that emphasized hygiene and sanitation above all else. Thanks to Florences innovations, connections, and sheer determination, nursing transformed from a job done by untrained women who just needed work to a trained, formal profession. Selected Florence Nightingale Quotations Rather, ten times, die in the surf, heralding the way to a new world, than stand idly on the shore.Let whoever is in charge keep this simple question in her head (not, how can I always do this right thing myself, but) how can I provide for this right thing to be always done?Women never have a half-hour in all their lives (excepting before or after anybody is up in the house) that they can call their own, without fear of offending or of hurting someone. Why do people sit up so late, or, more rarely, get up so early? Not because the day is not long enough, but because they have no time in the day to themselves. [1852]And so is the world put back by the death of every one who has to sacrifice the development of his or her peculiar gifts (which were meant, not for selfish gratification, but for the improvement of that world) to conventionality. [1852]It may seem a strange principle to enunciate as the very first requirement in a Hospital that it should do the sick no harm. [1859]I did no t think of going to give myself a position, but for the sake of common humanity. [about her Crimean war service]Nursing is become a profession. Trained Nursing no longer an object but a fact. But oh, if home Nursing could become an everyday fact here in this big city of London.... [1900]I can stand out the war with any man.I stand at the altar of the murdered men, and, while I live, I fight their cause. [1856]Never dispute with anybody who wishes to contradict you, says a most reasonable saint. For even if you are victorious, yours ifs the loss. [1873]Asceticism is the trifling of an enthusiast with his power, a puerile coquetting with his selfishness or his vanity, in the absence of any sufficiently great object to employ the first or overcome the last. [1857]No man, not even a doctor, ever gives any other definition of what a nurse should be than this -- devoted and obedient. This definition would do just as well for a porter. It might even do for a horse. It would not do for a po liceman. [1859]While my dear mother loses her memory (consciously, alas! to herself) she gains in every thing else -- in truth of view, in real memory of the phases of the past, in appreciation of her great blessings, in happiness, real content and cheerfulness -- and in lovingness. I am quite sure that, during the nearly half-century in which I have known her, I have never seen her any thing like so good, so happy, so wise or so really true as she is now. [letter, about 1870]For what is Mysticism? Is it not the attempt to draw near to God, not by rites or ceremonies, but by inward disposition? Is it not merely a hard word for The Kingdom of Heaven is within? Heaven is neither a place nor a time. [1873]Mankind must make heaven before we can go to heaven (as the phrase is), in this world as in any other. [1873]To be a fellow worker with God is the highest aspiration of which we can conceive man capable. [1873]I am of certain convinced that the greatest heroes are those who do their d uty in the daily grind of domestic affairs whilst the world whirls as a maddening dreidel.You ask me why I do not write something.... I think ones feelings waste themselves in words, they ought all to be distilled into actions and into actions which bring results. Selected Sources Nightingale, Florence. Notes on Nursing: What Nursing Is, What Nursing is Not.  Philadelphia, London, Montreal: J.B. Lippincott Co. 1946 Reprint. First published London, 1859: Harrison Sons.Nightingale, Florence; McDonald, Lynn.  Florence Nightingales Spiritual Journey: Biblical Annotations, Sermons and Journal Notes. Collected Works of Florence Nighingale (Editor Lynn McDonald). Ontario, Canada: Wilfrid Laurier University Press, 2001.Florence Nightingales Theology: Essays, Letters and Journal Notes. Collected Works of Florence Nighingale (Editor Lynn McDonald).  Ontario, Canada: Wilfrid Laurier University Press. 2002.