Based on New tonian mechanics ,the dynamic equations of the ball were established and the numerical solution was got by the forth order Runge‐Kutta method .To be more specific ,two models were built under ideal and non‐ideal conditions ,respectively .In the first model ,air resistance was neglected .A precession of the orbit of the ball was found .Moreover ,the angle of precession would decrease with the increase of the obliquity of the cone .When the latter approaching a particular value of approximately 55 .6° ,the precession vanished and ...
