The main task of mechanics

January 3rd, 2012

The main task of mechanics consists of a definition of mathematical kind of dependence of the body position from time:


       The solution of the task is possible with a definition of the frame of reference, which consists of a body of reference with associated coordinate system, and of an

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Bernoulli’s principle for liquids and gases

January 2nd, 2012

       The law of conservation of mechanical energy for liquids and gases is a special kind formulated by Bernoulli. Let’s consider the conclusion of the law on the example of an ideal incompressible fluid. The ideal liquid is such liquid in which the internal friction can be ignored,  Read the rest of this entry »

The law of conservation of mechanical energy

January 1st, 2012

   The energy is one of the concepts in physics, for which there exists no any definition, ie, undefined concept. We can feel the energy released  in the form of heat when through a conductor pass a current , we can estimate the reserve of potential energy of the ball above the Earth’s surface according to the magnitude of its deformation after impact on the surface, etc.

   Yet energy concept is an intuitive concept. Read the rest of this entry »

Solution of task using graph

December 29th, 2011

   The process of solving the problem is a type of mental activity, so to successfully meet the challenges need to be clear about the logical relationships between the physical quantities. To build a system of logical connections let’s consider a mathematical object that has the name of the graph.

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The addition of forces in dynamics

December 26th, 2011

The dynamics equations are based on the determination of the causes of body movements and their impact on the type of movement. The dynamic equations are the solution to the basic problems of mechanics, but these solutions are expressed using dynamic variables: force, energy, momentum.  

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Fiber optic current sensor

December 26th, 2011

In the electric power industry and the electrochemical industry is the measurement problem of strong currents of a few hundred kA.The company  ABB  has developed for this purpose the Fiber-Optic Current Sensor (FOCS).

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Semantic network for solving tasks of kinematics

December 11th, 2011

This headline is entirely devoted to solving problems. It contains two categories – the training examples for testing for control of the most common relationships between the physical quantities, as well as a workshop on the task solutions.  Read the rest of this entry »