A dimensionless quantity named after this force can be calculated using the Haaland equation or the Darcy-Weisbach equation. (10[3])A quantity named after this force is plotted against the Hersey number on a Stribeck (-5[1])curve. This non-electrostatic (10[1])force is independent of velocity by Coulomb’s law, and is independent of apparent surface area by the second (10[2])of Amontons’ laws. (10[1])Electricity is produced (10[1])by this force (10[1])in the triboelectric effect. The static form (10[1])of this (10[1])force equals the (10[1])normal (10[1])force times (10[1])its namesake coefficient, denoted (10[1])mu (10[1])(“moo”). Lubricants reduce the effect of this force. For 10 points, name this force that resists objects sliding past each other. ■END■ (10[1])