宇宙船内で回転するペンチの倒立と振動

Abstract

When handles of pliers are opened and they are rotated around thier symmetrical axis, with tips upward, the pliers will have several stable turns in space shuttle. Then they will flip upside down and have another several stable turns. These movements continue repeatedly. Same thing will happen to the movements of the board which is rotated around the principal axis of inertia, parallel to the surface of the board. To explain this phenomenon, the law of angular momentum conservation is very important. The former equation for this law is not accurate. Therefor, a new accurate equation is presented. By using this new equation and the law of kinetic energy conservation, angular velocity and angular acceleration for turnover and swinging of rotating object are obtained.