Chapter 8
Potential Energy and Energy Conservation
Гравитационная потенциальная энергия
Potential energy is not just a property of each object, but also a property of the interactions between objects in a chosen system. For each type of ...
Упругая потенциальная энергия
Elastic potential energy is the energy stored as a result of the deformation of an elastic object, such as the stretching of a spring. An object is ...
Сохранение механической энергии
The mechanical energy E of a system is the sum of its potential energy U and the kinetic energy K of the objects within it. What happens to this ...
Работа над системой под действием внешней силы
The work done by an external force on a particle changes its kinetic energy. However, internal forces must also be considered for a system of interacting ...
Консервативные силы
According to the law of conservation of energy, any transition between kinetic and potential energy conserves the total energy of the system. Hence, the ...
Неконсервативные силы
Non-conservative forces are dissipative forces such as friction or air resistance. These forces take energy away from a system as it progresses. Unlike ...
Энергосбережение
The terms 'conserved quantity' and 'conservation law' have specific scientific meanings in physics, which differ from the ...
Сохранение энергии: применение
When solving problems using the energy conservation law, the object (system) to be studied should first be identified. Often, in applications of energy ...
Сила и потенциальная энергия в одном измерении
Force can be calculated from the expression for potential energy, which is a function of position. The component of a conservative force, in a particular ...
Сила и потенциальная энергия в трех измерениях
Consider a particle moving under the action of a conservative force that has components along each coordinate axis. Each component of force is a function ...
Энергетические диаграммы - I
The dynamics of a mechanical system can be easily understood by interpreting a potential energy diagram. Since energy is a scalar quantity, the ...
Энергетические диаграммы - II
Energy diagrams are important to understand the dynamics of a system. The topology of an energy diagram helps illustrate the equilibrium points of the ...
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