Table of contentsSimple mechanical devicesTransportModern communicationNatural applicationsGalileo's testShowing the way to Newton.Newton's three laws of motion.Introduced by Newton in his Principia (1687), the three laws are : Mass and gravitational accelerationWorks citedDynamics related to the study of forces and torques and their effect on movement. It is the branch of physics (more precisely of classical mechanics). It's the opposite of cinematic. Kinematics studies the movement of objects without reference to its causes. Say no to plagiarism. Get a tailor-made essay on “Why Violent Video Games Should Not Be Banned”? Get the original essay Simple Mechanical Devices We can see physics in many places. One of them is a simple lever (like in a park). The levers are available in three versions, each of which has a different location. They serve to amplify force, thereby reducing the weight of an object at the opposite end. A simple “swing” in a park consists of a lever (the places to sit) and a support point (placed in the middle). The two opposing forces balance each other, creating smooth motion through the air. Transportation The transportation industry is no stranger to manipulating everyday physics. Cars and trains use the wheel, preventing gravity from slowing an object's movement, allowing it to act like a constantly moving object. Airplanes provide lift as well as forward momentum. They manipulate physics by creating lift through the shape of the wing as well as the angle of the wing, both of which serve to modify airflow. Modern communicationPhysics is all relative to itself. This theme resonates in Einstein's theories of special and general relativity. The focus is on the physics of time, which varies across the universe and does not maintain a uniform structure; the speed of an object can order the flow of time from and on that object. A manipulation of this exists in GPS satellites. These satellites take into account time variations between the GPS receiver and the satellite. Natural Applications As you read this sentence, physics is working. Yeah… Eyes have evolved into many types. The ears hear sounds. Sounds result from the alteration of air molecules. Although quantum physics exists in everything. Every day, for example, plants break down sunlight and absorb water and carbon dioxide, producing glucose and releasing oxygen.Galileo's TestLet's return to Galileo. It was primarily related to a form of acceleration that occurs due to the force of gravity. Aristotle provided an explanation of gravity by stating that objects fall into their “natural” position. Galileo set out to develop the first scientific explanation for how objects fall to the ground. According to Galileo's predictions, two metal balls of different sizes would fall with the same acceleration rate. To test his hypotheses, he couldn't simply drop two balls from a roof and measure their rate of fall. Objects are falling quickly and he had to find another way to show how fast the objects were falling. He did this by resorting to a method of Aristotle: the use of mathematics as a means of modeling the behavior of objects. Since he couldn't measure the speed of the object, he had to find an equation relating the total distance to the total time. Through a series of detailed steps, Galileo discovered that in uniform acceleration from rest, there is a proportional relationship between distance and time. With thismathematical model, Galileo, the renowned scientist, was able to demonstrate uniform acceleration. He did this using an experimental model: an inclined plane, on which he rolled a perfect, round ball. This allowed him to extrapolate that in free fall, even though the speed was greater, the same proportions still applied and therefore the acceleration was constant. Lead the way to Newton. The effects of Galileo's system were formidable: it demonstrated mathematically that acceleration is constant and established a method of hypothesis and experiment that became the basis of subsequent scientific inquiry. He did not, however, attempt to calculate a figure for the acceleration of bodies in free fall; nor did he attempt to explain the general principle of gravity, or even why objects move the way they do – the central focus of a subdiscipline known as dynamics. At the end of Two New Sciences, Sagredo made a strong prediction: "I truly believe that... the principles set out in this little treatise, once taken up by minds, will lead to another more remarkable result..." This prediction would come true thanks to to the work of a man who, because he lived in a somewhat more enlightened age, was free to explore the implications of his physical studies without fear of intervention from Rome. Born in 1564, Galileo died in 1642. His name was Sir Isaac Newton. Newton's three laws of motion. In discussing the motion of the planets, Galileo had coined a term to describe the tendency of an object in motion to stay in motion, and an object at rest to stay at rest. The term was inertia. Introduced by Newton in his Principia (1687), the three laws are: First law of motion: An object at rest will remain at rest, and an object in motion will remain in motion, at a constant speed unless or until external forces act on it. The second law of motion: The net force acting on an object is the product of its mass times its acceleration. Third Law of Motion: When one object exerts a force on another, the second object exerts a force on the first that is equal in magnitude but opposite in direction. These laws end with Aristotle's system. Instead of “natural” motion, Newton represented the concept of motion at constant speed, whether that speed was a state of rest or uniform motion. In fact, the closest thing to “natural” movement is the behavior of objects in space. There, without friction and far from the gravitational attraction of the Earth or other bodies, an object set in motion will remain eternally in motion due to its own inertia. It follows from this watch, by chance, that Newton's laws were and are universal. Mass and Gravitational Acceleration The first law establishes the principle of inertia, and the second law refers to the means by which inertia is measured: the mass, or resistance, of an object. object to a change in its movement, including a change in speed. Mass is one of the most fundamental concepts in the world of physics, and it is also the subject of a popular misconception: that of confusing it with weight. In fact, weight is a force equal to mass times the acceleration due to gravity. It was Newton, through a series of complicated steps that he explained in his Principia, who made the calculation of this acceleration possible – an act of quantification that had eluded Galileo. The most often used figure for gravitational acceleration at sea level is 32 feet (9.8 m) per square second. This means that in the first second an object falls at a speed of 32 feet per second, but its speed also increases at a speed of 32 feet per second..