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What is Physics?
The Meaning and Importance
During the seventeenth century, the modern science of physics started to emerge and become a widespread tool used around the world. Many prominent people contributed to the build up of this fascinating field and managed to generally define it as the science of matter and energy and their interactions. However, as we know, physics is much more than that. It explains the world around us in every form imaginable. The study of physics is a fundamental science that helps the advancing knowledge of the natural world, technology and aids in the other sciences and in our economy. Without the field of physics, the world today would be a complete mystery, everything would be different because of the significance physics has on our life as individuals and as a society.
In the natural world, physicists find new discoveries constantly. Some of these discoveries include the study of motion and forces. The well-known scientist, Isaac Newton, came up with the three laws of motion, which state rules and facts about the movement of an object. Our textbook states the laws of motion, as ?A body in motion will remain in motion at a constant speed and direction unless an outside force acts upon it. The net force acting upon an object is directly related to the mass and acceleration of the object resulting acceleration is in the direction of the net force, which is the vector sum of all forces acting upon the object. Finally, the third law of motion states that when one object applies a force to another, the other object applies the same amount of force back to the first object, but in opposite directions.? With these laws of motion, we can understand in detail how our world works. Also, that the movement of an object is more complex than a simple push. This discovery is taught to students all over the world because of its great importance and will continue to enhance the knowledge of the mystery of our earth.
The importance of physics not only lies in the discoveries of the natural world, but in the technology in our modern lives. Today we use many gadgets in our everyday tasks, which act as convenient aids to all of our needs. Some of these little novelties are cell phones, radios, computers, lasers used in eye surgery, fiber optics used in phone lines, calculators, hearing aids, and even global positioning systems.
In 1687, Newton published Philosophiae Naturalis Principia Mathematica (also known as Principia). The Principia was the “climax of Newton's professional life” (“Sir Isaac Newton”, 370). This book contains not only information on gravity, but Newton’s Three Laws of Motion. The First Law states that an object in constant motion will remain in motion unless an outside force is applied. The Second Law states that an object accelerates when a force is applied to a mass and greater force is needed to accelerate an object with a larger mass. The Third Law states that for every action there is an opposite and equal reaction. These laws were fundamental in explaining the elliptical orbits of planets, moons, and comets. They were also used to calculate
Kinematics unlike Newton’s three laws is the study of the motion of objects. The “Kinematic Equations” all have four variables.These equations can help us understand and predict an object’s motion. The four equations use the following variables; displacement of the object, the time the object was moving, the acceleration of the object, the initial velocity of the object and the final velocity of the object. While Newton’s three laws have co-operated to help create and improve the study of
Isaac Newton discovered gravity when an apple had fallen on his head. He then began to think about how the apple had fallen onto his head and thus Newton’s three laws of motion were created. Newton’s first law of motion is an object in motion tends to stay in motion; an object at rest tends to stay at rest, unless another force is acted upon it. Newton’s second law of motion is about the formula for force, which is force= mass*acceleration. Newton’s third law of motion is for every action there is an equal and opposite reaction. Furthermore, Isaac Newton created the three laws of motion.
On a constant basis, we experience Newton’s Laws of Motion, but do not know it. In 1687, Sir Isaac Newton formally published his three immortal Laws of Motion into one of his greatest works. The third and shortest of these scientific marvels, relating to momentum, states that every action force has an equal and opposite reaction force, which is true in both science and life, although we can barely detect certain hypothetical reaction forces. An exemplary instance of this is when parents educate their children, then children then educate their parents in return, a barely detected “reaction”. The power of children are also shown in classic literature, especially the works of The Bard, William Shakespeare. The jinxed “Scottish Play”, Macbeth,
Einstein’s Special Theory of Relativity has had a colossal impact on the world and is the accepted physical theory reg...
Isaac Newton, (1642-1727) was an English scientist and statesman. Although his views were thought to contradict the bible he was the only man of these three which proved his views to be true. He discovered gravity and the laws of motion. He stated that, 'every particle in the universe is attracted to every other particle by a force that is directly related to the product of their masses and inversely related to the squares of the distance between them.
Here mass, acceleration, momentum, and force are the quantities that are defined externally i.e. they are the externally defined quantities. It is also equally true that Newton’s laws of motion do not suffice to characterize the motion of deformable and rigid bodies. After the generalization of the laws of motion propounded by Newton in 1950 by Leonhard Euler, the laws were equally accepted for rigid bodies, and this was later called as Euler's laws of motion. This theory was later applied in the deformable bodies, and the laws were equally true in that condition, as well. Even though this law is outmoded by laws of relativity, this law is equally applicable in the situation where the speed of objects are less than the speed with which light travels.
Throughout Albert Einstein’s lifetime he accomplished many amazing things that have an effect on people today. For example, in 1905, “often called as Einstein’s “miracle year”, he published four papers in the Annalen der Physik, each of which would alter the course of modern physics” (Michio,Kaku 13). Throughout Einstein’s four books, he “applied the quantum theory to light in order to explain the photoelectric effect, offered the first experimental proof of the existence of atoms, laid out the mathematical theory of special relativity, and proved the first mechanism to explain the energy source of the Sun and other stars”(13). Throughout 1905-1915 Einstein began to realize that his theory for relativity was flawed, because “it made no mention of gravitation or acceleration” (19). “In November of 1915, Einstein finally completed the general theory of reality” (20); “in 1921 he won the Nobel Prize in Physics” (Belanger, Craig. 1).
During the sixteenth and seventeenth centuries the scientific revolution brought about a slow change in societies’ thinking regarding math, earth science, physics, and astronomy. Early on, new ideas about our universe were not widely accepted, especially from the church. This soon changed due to the hard work and perseverance of several scientists and philosophers who unbeknownst to them brought about an era known as the Enlightenment.
Physics can be found in all aspects of our lives and the world around us including the activities in which we find the most enjoyment. They may not be noticeable to the naked eye or even to our senses but they are there and when we become familiar with the concepts of physics then we began to ‘see’ physics everywhere.
Kirkpatrick, Larry, and Gerald F. Wheeler. Physics: A World View. 4th ed. Orlando: Harcourt College Publishers, 2001.
Sir Isaac Newton is the man well known for his discoveries around the term, Motion. He came up with three basic ideas, called Newton’s three laws of motion.
In real life situations, there are many applications of physics. Physics is applied in almost everything we do and everything around us from household chores, in school and in
From a very young age, I have enjoyed reading a wide spectrum of topics. However, during high school, I had become preoccupied with physics during my studies and readings, and so I began to focus my attention upon the materials that further shed light on the science. The more I read, the more I became intrigued with the interrelations between matter, energy, and time and space motion illustrated through the science. Therefore, motivated to become one of Saudi Arabia’ few female physicists, upon graduating from high school I opted to major in the science that captivated me like no other....
Of all the scientists to emerge from the nineteenth and twentieth centuries there is one whose name is known by almost all living people. While most of these do not understand this mans work, everyone knows that his impact on the world is astonishing.