Upthrust = change in weight density = massvolume Mass of liquid displaced = Density of Liquid × Volume; = 103×50×10−6m3 = 0.05kg (Note that the volume of 50cm3 was converted to m3 by multiplying by 106) i.e 50cm3=50×10−6m3 Since mass displaced = 0.05kg Upthrust = mg = 0.05 × 10 = 0.5N
