Calculate the upthrust on an object of volume 50cm3 which is immersed in liquid of density \(10^{3}\) kgm-3 [g = 10ms-2]
0.8N
2.5N
0.5N
1.0N
Explanation
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Discussions (18)

Density=mass÷volume
Mass of the liquid =density ×volume ×acceleration due to gravity
Density 103kgm convert to gm =103÷1000=0.103gm while volume 50cm=50÷100=0.5m
Therefore, 0.5×0.103×10=0.5

Answer is right but steps are quite mystifying. it's just simple like this,
Upthrust/Buoyancy= PVG(density, volume,gravity)
remember converting cm³ to m³ is cm³/1,000,000 making 50cm³ to be 0.00005
and 10³ is same as 1000
therefore, 1000x0.00005x10=0.5.
it's that simple ✍️✍️

You can simply use the formula: Upthrust=PVG (P= Density, V= Volume, G= Acceleration due to gravity)
Converting 50cm³ to m³ - 50×10^-6m³
Upthrust = 10³×5×10^-5×10
Upthrust= 0.5N

omo, this formula is one kind 
the one i use is upthrust= volume×density×acceleration due to gravity


