Resistance corresponding to the initial moment of movement, explaining the physical essence of friction (roughness, sticking, deformation), and also include the emergence of the force of inertia. The latter is determined by the work of the mass to accelerate (y = mv) and therefore cannot reach large values, since the speed of the speed is extremely insignificant. Almost due to the discontinuity of the action of moving devices (rearrangement of jacks), the force of inertia has to be overcome repeatedly. The size of the initial resistances cannot exceed 10 — 20 °/0 from friction force.
Causes of harmful resistances: how to identify
