Depth and slip ratio dependencies of friction for a sphere rolling on a granular slope

data_of_figures.xlsxContains all datasets used to generate the figures in this study. [sphere name]_raw_data.xlsxContains the time-series data (X(t), v(t), δ(t)) for each experimental run. [sphere name]_all_data.xlsxContains the characterized quantities (v, α, L, s, δ) for each experimental run. XYZN.aviVideo file naming convention: X: sphere material Y: slope angle (in degrees) Z: initial position N: run number Sphere material codes: p: polyethylene a: polyacetal g: glass c: alumina ceramic Example:p5h1 → polyethylene sphere, slope angle = 5°, initial position = h, run number = 1.