Lemma
DeepCurves in space
Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §12.2 Plane Motion: Projectiles and Cycloids, #40 · Multivariable Calculus · Curves in space

Suppose a heavy weight is attached to the top of the rolling…

Suppose a heavy weight is attached to the top of the rolling circle. What is the path of the weight?

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §12.2 Plane Motion: Projectiles and Cycloids, #40

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