Involvement of Rotational Energy in Experiment on Mechanical Energy Conservation Law

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  • 力学的エネルギー保存則の実験における回転エネルギーの関与

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The law of energy conservation is most basic and universal in natural phenomena. At mechanics of material particle，the conservation law of mechanical energy correlates only potential energy with translational kinetic energy. However, in the motion of a rigid body, the energy of rotation must be added. In this paper, we discuss the conservation law of mechanical energy from student experiments, when a rigid body does not rotate and when it rotates. By analyzing experimental data, students understand the concept of the conservation law of mechanical energy, which includes the energy of rotation in the motion of a rigid body.

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