Physics Key Points - 4438 Words

A force can do one of four things to an object: 1. Make it speed up - accelerate. 2. Make it slow down - decelerate. 3. Change its direction. 4. Change its shape. If something is doing one of these four things there must be net force acting upon it. Newtons First Law Every body continues in a state of rest or uniform motion unless acted upon by an external force. Something without net force acting on it will either stay still or move at a constant speed in a straight line until you apply a force to it. F = ma Newtons Second Law: †¢ F is the force in Newton’s, N. †¢ m is the mass in kilograms, kg. †¢ a is the acceleration in m/s2. This shows that if you keep the mass constant and double the applied†¦show more content†¦There are three rules of reflection that you need to know. 1. The angle of incidence always equals the angle or reflection. 2. The distance from the object to mirror is the same as the distance from the mirror to the image. 3. The image is always the same size as the object but is laterally inverted. Refraction is the bending of a wave when it goes from one substance into another. Refraction happens because the speed and wavelength of the wave changes as the wave goes into the other substance. The frequency of the wave stays the same. Total internal reflection happens when the angle of incidence, of a wave going from a substance into air, is greater than the critical angle. The wave bounces off the boundary, obeying the rules of reflection. Dispersion of white light produces a spectrum. This is caused by refraction. Light of different frequencies is refracted by different amounts. Red is refracted the least and violet the most. This causes white light to be split up into seperate colours. Diffraction is the spreading out of a wave as it goes through a gap, or around an object. The smaller the gap or the larger the wavelength the greater the diffraction. Diffraction is most effective when the size of the gap is approximately the same as the wavelength of the wave. You will need to be able to draw diagrams showing how waves reflect, refract and diffract. Sound waves are caused by particles vibrating. The frequency of the vibration decides theShow MoreRelatedPersonal Statement Of Teaching Philosophy979 Words   |  4 PagesStatement of Teaching Philosophy M. Th. Hassan The student is the key element in the education process and teaching is in the heart of this process. The mentor should direct the student in his journey of study, and give him/her a clear space for creativity. My primary goal will be to help the students to think about their own thinking so they are able to recognize shortcomings and correct their reasoning as they go, as well as develop their skills, to be independent scholars. I am a lifelong learnerRead MoreThe Physics of Piano1027 Words   |  4 Pagesof the most common musical instruments in many homes is the piano; and most people have the opportunity for even a few lessons in their youth. However, despite the simplicity of its lines and keys (88 keys), 2-3 pedals on the modern piano, and either upright (vertical) or grand style (horizontal), the physics of the piano are both interesting and complex. The modern piano is a descendent of the harpsichord, which used a plucking technique much like that of plucking the strings of a harp or luteRead MoreRole of Physics in Sports1180 Words   |  5 PagesThe motions of throwing, batting, and fielding will be presented in physics terms and ideas. Physics plays a big role in sports. One particular sport is softball, where we will be seeing different motions represented. First, we are going to look at the two different types of throwing. There is the regular over-hand throw and there is also the pitching style. When looking at the regular over-hand throw and the pitching style of throwing, many of the same concepts apply to both. In pitching, thereRead MoreEssay On Physics Of Complex Systems722 Words   |  3 Pagesand fascinating research areas in physics nowadays is the physics of complex systems, or the theory of complexity. There is not a single and straightforward meaning associated with this buzzword due to its vagueness and polysemy, and very often it depends on the context and the authors. Nevertheless, one of the interesting points are the tools and methods that the theory provides that can be eventually applied to many different disciplines, ranging from physics, chemistry, biology, applied sciencesRead MorePhysics : The Physics Of Physics1654 Words   |  7 PagesPhysics is defined as a branch of science that explains the properties of matter and energy. The study of Physics offers explanations for many topics like mechanics, light, heat, and electricity. Physics is present in all forms throughout a person’s life. It could be from the smallest crunch of an autumn leaf to the many ways energy is harnessed to support the lifestyle we’ve become accustomed. Physics is literally everywhere. Physics is most strongly presented in my life by automobiles, how physicsRead MoreEssay about The Physics of Judo937 Words   |  4 PagesThe Physics of Judo Judo is a martial art that is centered around physics. Even just the concept of throwing somebody is physics. To practice judo and not have a basic knowledge of physics is insane considering that physics is what makes judo possible. Judo is sport that consist of throws, take downs and over all control. Judo without physics is like have a sandwich with just bread, you don’t get much out of it. To understand how physics comes into play with judo we must start with Newton’sRead More Physics Of Bowling Essay1188 Words   |  5 PagesPhysics Of Bowling The one thing that interests me is bowling. I have been playing all my life and after a whole semester and a half of being in Mr. Fetter’s class, I realized that everything has physics in it. One night after going bowling with my girlfriend(s) I wondered why when I hit the first pin, only seven went down and thus I lost the game. So, I got on the Internet and found a lot of articles and web sites talking about the physics of bowling. A lot of the web sites were brief descriptionsRead MoreCoherence, Entanglement, And Topological Phases Of Quantum Mechanical Waves832 Words   |  4 PagesI am a theoretical physicist working on quantum mechanical aspects of condensed matter and solid state physics. My past research highlights coherence, entanglement, and topology in condensed matter systems. These features are unique in quantum systems, and can give rise to phenomena that do not have classical counterparts. Target systems of my interest include mesoscopic/nanoscopic systems such as graphene, spintronics, topological insulators, and strongly correlated electron systems such as quantumRead MorePrinciples of Physics of Gymnastics963 Words   |  4 Pagescombine creativity with the laws of physics. Sports-writer Tommy Deas explains, â€Å"Gymnastics may seem to defy gravity and the laws of the universe as they tumble and spin through the air, but they are actually relying on the principles of physics to perform their feats† (Deas). Spectators are memorized and amazed by theses seemingly impossible skills, however, from a physicist’s perspective; gymnastics can be broken down from a few simple principles of physics. There are many different ways forRead MoreMy Favorite Class1024 Words   |  5 Pagesstudents would rather be on his or her phone or sleep. My physics teacher, during junior year of high school, is the definition of what school should be. He inspires everyone in the class towards the subject at hand. Due to the inspiration led to knowledge that most people wouldnt have if you run a clock in- clock out outlook. He made the class fun by having group work, labs, class discussion, and experiments that he performed. Mr. Sanfords physics class was my favorite class because the inspiration