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Earlier discussion
2 older comments kept for context.
Johnson
103 * 50 * 10 ^(-6) = 5150 * (10^ (-6))
= 0.00515kg
Force = 5150 * (10^(-5)) N
= 0.0515N
Oluwaseun Adeyemi
Upthrust = change in weight
density = \(\frac{\text{mass}}{\text{volume}}\)
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