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Dobrý den, nebyl by mi někdo schopen, prosím pomoct vypočítat tyto 2 úlohy? Vůbec si s tím nevim rady. Předem děkuji
Obsah stykových ploch pásu traktoru se zemí je 2,5 m2. Tlak,který způsobuje traktor na zemi je 50kPa .Jak velkou tlakovou silou působí traktor na zemi ?
Vypočítej tlak, který způsobuje železniční vago'n o hmotnosti 30 tun na vodorovné kolejnice, je.li obsah stykové plochy kol s kolejnicemi 0,8 dm2
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