The secondary resistances are independent of the length of the belt conveyor and are constant [5]. With long distances
between axes, their significance declines compared to motion resistances distributed across the conveying track - the
primary resistances. If the proportion of secondary resistances within the total number of resistances is low, a general
assumption Is permissible. The total sum of the secondary resistances is taken into consideration by the coefficient C [5].
Fig. 1:
Belt conveyor with existing motion resistances [9]
Special resistances Fs
Special resistances are resistances which do not occur with all belt conveyors. These are especially the vertical resistance of
idlers, friction resistances outside feeder stations and resistances of the equipment used for feeding the bulk materials.