第８章
位置エネルギーとエネルギー保存
重力ポテンシャルエネルギー
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 ...
弾性ポテンシャルエネルギー
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 ...
機械エネルギーの保存
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 ...
外力によってシステム上で行われる作業
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 ...
保守勢力
According to the law of conservation of energy, any transition between kinetic and potential energy conserves the total energy of the system. Hence, the ...
非保守的な勢力
Non-conservative forces are dissipative forces such as friction or air resistance. These forces take energy away from a system as it progresses. Unlike ...
エネルギー保存
The terms 'conserved quantity' and 'conservation law' have specific scientific meanings in physics, which differ from the ...
エネルギー保存:応用
When solving problems using the energy conservation law, the object (system) to be studied should first be identified. Often, in applications of energy ...
1次元の力と位置エネルギー
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 ...
3次元の力と位置エネルギー
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 ...
エネルギー図 - I
The dynamics of a mechanical system can be easily understood by interpreting a potential energy diagram. Since energy is a scalar quantity, the ...
エネルギー図 - 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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