This is how things works on Instagram: "Prof. Walter Lewin, the renowned MIT physics professor, often demonstrated the gyroscope effect in his lectures to show the fascinating laws of rotational motion. In his demonstration, he would hold a fast-spinning bicycle wheel by a handle and then let go of one side. Instead of falling due to gravity, the wheel would begin to precess—slowly rotating around a vertical axis. This surprised many students, as it clearly showed how angular momentum and torque

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