Fig. 5: Frictional characteristics for MLB and NPB balls.
From: Effect of grip-enhancing agents on sliding friction between a fingertip and a baseball
a–d Relation between the horizontal force Fy_μmax and normal force Fz_μmax at the instant of each maximum value of the friction coefficient µmax for each participant (with different plot color) under no application condition for MLB ball with seam (the same graph as Fig. 2a) (a), NPB ball with seam (b), MLB ball without seam (the same graph as Fig. 2d) (c), and NPB ball with seam (d). e–h Relation between µmax and normal force at µmax under no application condition for each participant (with different plot color) under no application condition for MLB ball with seam (the same graph as Fig. 2g) (e), NPB ball with seam (f), MLB ball without seam (the same graph as Fig. 2j) (g), and NPB ball with seam (h).
