Desperately accelerating and slipping with all four driving wheels, the driver in the Niva is trying to drive along a snowy and icy road, which, fortunately, has a stable track, onto a long steep climb, in front of which there is a 10% sign (i.e., the angle of climb a = arcsin0,1). After preliminary acceleration on a horizontal section (also with slipping), he succeeds. On the way back along the already softened road, he notes on the speedometer that the acceleration length turned out to be equal to the ascent distance. P

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