Where is the centre of percussion in accelerated handheld implements?

Handheld implements are usually accelerated. The hand generates a free moment required for acceleration. By considering this torque, the centre of pressure moves further away from the centre of mass of the implement. In implements accelerated by a torque before impact, the centre of pressure is closer to the tip of the implement than in stationary implements. The hand force as a function of time was obtained from simulating impacts at various locations in an implement accelerated by a torque. The hand force was never zero throughout the impact. In higher impact locations, the hand force is negative first and then becomes positive. At the transition from positive to negative, the hand force is instantaneously zero. In lower impact locations, the hand force is always negative.