Fig. 13

Comparison between gravitational and cohesive forces depending on the grain radius. The black lines correspond to the measured pull-off force between SiO₂ polydisperse (Brisset et al. 2016) and quartz sand grains (Kendall et al. 1987). The grain sizes at which the measurements were performed are marked as diamond symbols. The dashed red lines show the gravitational forces on the regolith grains for different g-level environments. The green line marks the largest particles of our target size distributions