Fracture mechanics

Newton’s Laws Sir Isaac Newton, the man who developed the first theories of gravitation, also introduced the three laws of motion. These laws essentially changed the field of physics in an astounding manner – it paved the way to modern science. Let’s look at these laws in some more detail: Newton’s first law: It states that an object will remain at rest or in a uniform motion, unless an external force acts on it. This is basically also the definition for inertia. In other words, the state of…

There are six fundamental movements or primary movements which occur where the joints are located between the body segments. These movements are flexion (frontal plane, and shoulder) extension, abduction, adduction, rotation, and circumduction. As explained in our text, flexion is a decrease in the angle between two body segments, whereas extension is an increase in the angle between two body segments. Abduction is a movement away from the body, whereas adduction is a movement toward the…

Physics plays an important role in the mechanics of a roller coaster. The thrilling ride cannot be appreciated, if the physics of a roller coaster is not understood. The loops, bends and hills are all affected by physics. The first hill of a roller coaster is the initial start of energy. Potential energy begins the transfer of energy on the first hill. A chain motor pulls the cars to the top of the hill creating potential energy. Potential energy being defined as the energy determined by its…

Dirt bike or motocross racing is an extremely competitive sport that has been enjoyed by masses of people across the globe. Millions of people have either watched or are very passionate about dirt bike racing. This is a sport that has been around for over one hundred years when the idea first came about in the U.K. motorcycle trial competitions in the early 1900’s ("Motocross"). As the sport grew in popularity, many improvements were made including: the terrain of the tracks, motorcycle…

Greek scientists Archimedes. His theory is now referred to as Archimedes 's principle, or the law of fluid mechanics. It implies that there is force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces. He hypothesized this theory while in the bath. Unfortunately his theory only covered fluid mechanics and didn’t elaborate completely on force. However he was one of the first scientists to discover…

Erwin Schrödinger, an Austrian born chemist, gained his famed for his contributions to quantum mechanics. Some of his contributions to chemistry and quantum mechanics were his books describing his techniques and basic info behind his work, his paradox, Schrodinger’s cat, which created a lot of new discoveries in chemistry, and his equation that changed how many people viewed the atom and its electrons. At at young age, Schrodinger was strongly influenced by the philosophy of Austrian philosopher…

Breaks are not something people take the time to think about. Even if they are fundamental to the vehicles many people use every day. The functionality of breaks is contributed to physics and engineers ability to understand that physics. There is a lot going on when people press on the brake pedal in their car. The most basic principle of brake pads is in fact friction. This friction is the thing that transfers the energy of the car moving forward to heat energy. Brakes also use pressure as a…

IV: Rebuttals to my Characterisation of Reclamation In the above, I have created a model to represent to sociological phenomena of the reclamation of slurs. I have given an example how we can see this mechanism at work with respect to the word queer. Though this provides evidence in support of my thesis the question arises as to what measure should be used to more so test the effectiveness of the model. What should be considered and how can my thesis best be supported? The model which I have…

Ultrafast Electron Microscopy has been demonstrated to be an effective table-top technique for imaging the temporally-evolving dynamics of matter with subparticle spatial resolution on the time scale of atomic motion. A stringent enhancement of the UEM temporal resolution is demanded for recording snapshots of the electron motion which will provide a real-time access to all microscopic motions outside the atomic core and radically change our insight into the workings of the microcosm. Here, we…

Parana Pine: For the Parana Pine I obtained the published value from a website since the values on the lab sheet didn’t have a values for Parana Pine. Firstly, I calculated my own Young’s Modulus Value with the result got from the tests using the equation for Young’s Modulus in Bending: E= l³/(4bd^3 ) x ( Δw)/( Δx) From using this equation, I achieved 14.44 E/GPa as a value, the published value, was: 11.37 E/GPa found on ‘The Wood Database’. The difference between my results and the…