| 摘要 |
PROBLEM TO BE SOLVED: To provide a behavior observation machine capable of expressing an event in which magnetic force and gravity, centrifugal force and friction force are delicately tangled with a simple device and which can be utilized as an educational material according to a knowledge level and of which the fun of movement is utilized as display. SOLUTION: Combination is performed by various optimized amounts such as weight, torque and the friction force to be produced from outer diameter and thickness of an impeller 2 in correlation between inner diameter of an annular magnet 1 and diameter of guide low carbon steel wire. COPYRIGHT: (C)2005,JPO&NCIPI
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