| 摘要 |
PURPOSE: A method to induce resonance force on a simple pendulum of a simple harmonic motion by using a repulsive force of an electro-magnet are provided to swing a pendulum with low energy by using a repulsive power of an electromagnet as a resonance. CONSTITUTION: A permanent magnet(300) is installed under a weight(200) of a simple pendulum(100). A metal(400) and the electromagnet(500) are fixed under the permanent magnet. The magnetic force is generated between the permanent magnet and the metal. A repulsive power is generated between the permanent magnet and the electromagnet. The resonance is added to the weight of the simple pendulum. The resonance is generated by using the magnetic force and the repulsive power.
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