Physics
Ball on a spinning arm
A heavy ball on a rope from a rotating arm: it lags the arm and swings outward by inertia; cut the motor and the orbit spirals back in.
What happens
A heavy ball on a rope from a rotating arm: it lags the arm and swings outward by inertia; cut the motor and the orbit spirals back in. The massless rope can pull but cannot push. A slack rope permits free flight; motor speed is prescribed.
Equations used in the module
Equations P = (R cos φ, 0, R sin φ); φ' = Ω Ω' = (Ω_target−Ω)/τ m x'' = mg − c x' − T n |x−P| ≤ L; T ≥ 0; T(L−|x−P|) = 0 |x−P| < L: T = 0
