This is a project that investigates the classical mechanics problem, tennis racket effect. When a rigid body rotates along its second axis of inertia, its rotation is unstable and appears to “flip” periodically. We made an geometric explanation to this phenomenon and identified a divergence point in flipping time.

More information can be found in this Github repository.

Our work has been published on College Physics and the paper (in Chinese) can be found here [PDF].