Commercial “organic” friction materials were obtained from three different manufacturers, and were evaluated for their frictional properties. In all cases, the friction force (F) was found to be a power function of the normal load (P) and sliding speed (V) at a fixed temperature, F = K·Pa·Vb at T1, where K is the coefficient of friction which is constant and independent of the load and speed, and a and b are one set of parameters at the temperature T1. Usually, the exponent a ranges 0.80-1.25 and b from -0.25 to +0.25, depending upon the temperature. Thus, brake torque becomes a power function rather than a linear function of the line pressure. Brake fade is found to be governed by the three mechanisms-load fade, speed fade, and temperature fade.