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Table. 1.

Measured damping and resistance coefficients for various ball sizes. The numbers in parenthesis represent the standard deviations of five time measurements.

Ball radius (mm) Mass (g) Damping coefficient γ (1/s) Resistance coefficient c (kg/s)
5.75 6.36 0.00960 (0.00015) 1.22 × 10-4(2 × 10-6))
9.35 8.31 0.00861 (0.00005) 1.43 × 10-4(2 × 10-6))
12.05 12.35 0.00697 (0.00036) 1.72 × 10-4(9 × 10-6))
15.00 16.29 0.00674 (0.00004) 2.19 × 10-4(2 × 10-6))
18.00 23.48 0.00564 (0.00014) 2.65 × 10-4(7 × 10-6))
New Phys.: Sae Mulli 2021;71:1067~1075 https://doi.org/10.3938/NPSM.71.1067
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