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m2 =(100% - 20%)m1
a1 /a2 = F1/m1 : F2/m2
a1/a2 = F1·m2 /m1F2
a1/a2 = F1·80% m1 / m1·120%·F1
a1/a2 = 2/3
Odpowiedź A
Stosunek przyśpieszeń:
Odp. A