Figure 9.

UME and maximum contact force at constant impact speed (50 m/s) with various impact masses. UME and maximum contact force at constant impact speed (50 m/s) with various impact mass (from 8.7 × 10⁻¹⁹ to 7.1 × 10⁻¹⁷ g), and constant impact mass (2.8 × 10⁻¹⁸ g) with various impact speeds (from 10 to 90 m/s), for five-buckyball systems.