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dane: q1 = 1g/cm3, q2 = 7,9g/cm3, g = 10m/s2
szukane: a
a = F/m F = Q - Fw F-siła wypadk., Q=mg - ciężar ciała Q=q2*V*g
siła wyporu Fw= q1*g*V
a = [q2*V*g - q1*V*g]/q2*V = g*[q2 - q1]/q2 = 6,9*g/7,9 = 0,87g =
a = 0,87*10m/s2 = 8,7m/s2