Molecular dynamics simulations of energetic cluster bombardment (C_(20), C_(60), C_(120), C_(180)) are performed in the range of 5-20 keV on a solid benzene substrate. The goal is to study the trends exhibited by these bombardment events and to develop a simple analytical model that explains the general dynamics associated with cluster projectiles. These results indicate that the dynamics of these clusters can be described by a macroscale quadratic friction model and thus can provide an interpretation for the dependencies on cluster mass and size, as well as the observation that velocity of the cluster relative to its initial value decays exponentially with time with a decay constant that linearly depends on the initial velocity.
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