Static – the science of methods quantify the interaction forces between the bodies. These forces are responsible for maintaining balance, body movement or change their shape. In everyday life, you can see many different examples every day. Movement and change shape are critical to the functionality of both artificial and natural objects.

Static – a Theoretical Mechanics, statics

The concept of static

Fundamentals of statics were laid more than 2200 years ago when ancient Greek mathematician Archimedes and other scientists of the time learning the properties of amplifying and the emergence of simple mechanisms such as lever and axle. Statics – Mechanics section that deals with the forces that act on the body at rest provided balance.

It is a branch of physics that makes possible analytical and graphical procedures to identify and describe these unknown forces. The “static” (physics) play an important role in many areas of engineering, mechanical, civil, aviation and bioengineering, which deal with different implications forces. When the body is at rest or moving at a uniform speed, then it comes to this field of physics. Static – the study of the body in balance.

Methods and results of this branch of science were particularly useful in the design of buildings, bridges and dams, as well as cranes and similar mechanical devices. In order to calculate the size of structures and equipment, architects and engineers must first determine the forces acting on them interrelated parts.

Static – a Theoretical Mechanics, statics

Axioms of statics

Static – a branch of physics that studies the conditions under which the mechanical and other systems are in a state that does not change with time. This branch of physics based on five basic axioms:

1. A solid in a state of static equilibrium, if it there are two forces that have the same intensity, lie on a line of action and are directed in opposite directions along the same line.

2. Solid body will be in a static state as long as it is not influenced by external force or system of forces.

3. resultant of two forces acting in the same material point is the vector sum of the two forces. This axiom is subject to the principle of vector summation.

4. Two interacting bodies react to each other two forces equal in intensity in opposite directions along the same line of action. This axiom is also called the principle of action and reaction.

5. If the deformed body is in a state of static balance is not violated if the physical body remains in solid state. This axiom is also called the principle of hardening.

Static – a Theoretical Mechanics, statics

Mechanics and its sections

Physics in Greek (physikos – “natural” and “physis” – “nature”) literally means the science that deals with the nature. It covers all known laws and the properties of matter and the forces acting on it, including gravity, heat, light, magnetism, electricity and other forces that are able to change the basic characteristics of objects. One section of science is mechanics, including such important departments, as statics and dynamics and kinematics.

Mechanics – a branch of physics that deals with the study of forces, objects or bodies that are at rest or moving. This is one of the greatest actors in the field of science and technology. The task of static include a study of the state bodies under the influence of various forces. Kinematics – a branch of physics (mechanics), which studies the movement of objects regardless of the forces that cause movement.

Engineering Mechanics: Statics

Mechanics – a physical science which examines the behavior of bodies under the action of forces. There are 3 categories of mechanics: rigid bodies, deformable bodies and fluids. Solid body – a body that is not deformed by the forces. Theoretical Mechanics (Statics – Mechanics of rigid body) also includes dynamic, which, in turn, is divided into kinematics and kinetics.

Mechanics of deformable bodies dealing with the distribution of power within the body and are caused due to this strain. These internal forces cause some tension in the body, which ultimately could lead to a change in the material. These issues are studied in courses on strength of materials strength of materials.

Fluid mechanics – a chapter of Mechanics, which deals with the distribution of power within liquids or gases. Liquids are widely used in engineering. They can be classified as neszhymaemye or squeezable. Fields of application are hydraulics, aerospace and many others.

Static – a Theoretical Mechanics, statics

The concept of dynamics

Dynamics deals with power and movement. The only way to change the movement of the body – is to use force. Along with the power dynamics studies of other physical concepts, including the following: energy, momentum, collisions, center of gravity, torque and moment of inertia.

Static – a Theoretical Mechanics, statics

Statics and dynamics are completely opposite position. Dynamics – the doctrine of the body are not in balance, while there is acceleration. Kinetics is studying the forces that cause motion or forces resulting from motion. Unlike such thing as statics, kinematics – the study of body movement, which does not take into account the fact that it follows the movement. Sometimes it is called “the geometry of motion.”

Static – a Theoretical Mechanics, statics

Kinematics

Kinematic principles commonly used for analysis to determine the position, speed and acceleration in different parts of the equipment during operation. Kinematics considering the motion of a point, body and system of bodies without considering the causes of motion. The movement described vector quantities, such as displacement, velocity and acceleration along with an indication of the reference system. Different kinematics problems solved using the equations of motion.

Static – a Theoretical Mechanics, statics

Mechanics – Statics: Fundamental value

History mechanics has more than one century. Basic principles of statics have been developed long ago. All sorts of levers, inclined planes and other principles were needed in times of early civilizations to build, such huge structures like the pyramids.

Static – a Theoretical Mechanics, statics

The fundamental values of the mechanics are length, time, mass and strength. The first three are called absolute, not dependent on each other. Strength is not an absolute value, because it is associated with weight changes and speed.

Length

Length – a value used to describe the position of a point in space relative to another point. This distance is called the standard unit of length. The generally accepted standard units of length is the meter. This standard was formed and evolved over the years. At first it was one ten millionth of the quadrant of the earth’s surface, through which the measure was quite difficult. October 20, 1983, the meter was defined as the length of the path traveled by light in a vacuum 1/299792458 seconds.

Time

Time – is a certain interval between the two events. The generally accepted standard unit of time is second. The second was originally defined as 1/864 middle period of the Earth’s rotation around its axis. In 1956 a second definition was improved and amounted to 1/31556 time required for a complete turnover, which carries the Earth around the sun.

Static – a Theoretical Mechanics, statics

Mass

Weight – a property of matter. It can be seen as the quantity of a substance contained in the body. This category determines the effect of gravity on the body and resistance to change in motion. This resistance to change of motion is called inertia, which is the result of body weight. The common unit of mass is the kilogram.

Static – a Theoretical Mechanics, statics

Power

Power – this original unit, but the unit is very important to study mechanics. It is often defined as the action of one body to another, and may or may not be the result of direct contact between the bodies. Gravitational and electromagnetic forces are examples of the impact of such an outcome. There are two principles of the forces that seek to change the traffic system and which tend to deformities. The basic unit of force is Newton in SI and the English pound system.

Static – a Theoretical Mechanics, statics

The equation of equilibrium

Static assumes that the items in question are completely solid. The sum of all forces acting on the body at rest should be zero, that is participating forces balance each other and there should be no tendency for forces that can turn the body around any axis. These conditions are independent of each other, and their expression in mathematical form is the so-called equation of balance.

Static – a Theoretical Mechanics, statics

There are three equilibrium equation, so only three unknown forces can be calculated. When unknown forces will be more than three, it means that the components in the structure of the machine or slightly more than necessary to maintain certain loads, or that there was more restrictive than necessary to keep the body from moving.

Such unwanted components or excessive restrictions are called (for example, a table on four legs has a surplus), and the system of forces is statically indeterminate. The number of equations available in static, limited, since any solid remains firm under any circumstances, regardless of shape and size.