Calculate the upthrust on an object of volume 50cm3 which...
Calculate the upthrust on an object of volume 50cm3 which is immersed in liquid of density 103 kgm-3 [g = 10ms-2]
0.8N
2.5N
0.5N
1.0N
Correct answer is C
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