Figure 2
From: Collision-enhanced friction of a bouncing ball on a rough vibrating surface
(Figure prepared using Veusz https://veusz.github.io).
Friction of a bouncing ball. (a) Experimental measurement of bouncing ball (\(\Gamma\) = 3.25). The change in velocity at each bounce within 1 mm of the end walls (red) and the centre of the cell (blue). The gradient of the line indicates the frictional impulse. (b) The frictional impulse at different distances from the side wall. \(\Gamma\) = 2.25 (blue), 2.75 (yellow), 3.25 (red). (c) Simulation of a bouncing ball. The change in velocity of particles whose last collision was with the end wall (red) and those whose last collision was with the base (blue). (d) The frictional impulse for simulation at different distances from the side wall. \(\Gamma\) = 2.25 (blue), 2.75 (yellow), 3.25 (red).
