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Betsalel
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A plank with m=0.12 kg and 50cm long has one mass of m1=0.11kg sitting on one end and a m2=0.055kg at the other end. Where
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I figured the equation out Xcg=(m1x1+m2x2+m3(L/2))/(m1+m2+m3) m1 = 0.055kg x1 = 0cm m2 = 0.11kg x2 = 50cm for the plank you need to add m3 = 0.12kg and distance is L=50cm it calculates to Xcg=29.825cm
