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  • Precession
    Mechanics. the motion of the rotation axis of a rigid body, as a spinning top, when a disturbing torque is applied while the body is rotating such that the rotation axis describes a cone, with the vertical through the vertex of the body as axis of the cone, and the motion of the rotating body is perpendicular to the direction of the torque.

  • Unless it's so loose and the pedal-action so agricultural that as he's mashing he's pushing the pedal away from the crank.

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