Calculate the upthrust on an object of volume 5... - JAMB Physics 2017 Question

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