A block has a volume of 20cm^3 and weight 0.54 N, calculate the upthrust on the block. ( density of air =1.2kg/m^3, g = 10m/s^2 )
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Explanation:
Upthrust = weight of the liquid displaced by the submerged part of the body Upthrust = mass of liquid displaced x Acceleration due to gravity Upthrust = volume of liquid displaced x density of liquid displaced x Acceleration due to gravity,Since volume of solid immersed is equal to the volume of the liquid displaced, Upthrust = volume of solid immersed x density of liquid displaced x Acceleration due to gravity Upthrust = 0.2 x 1 x g = 0.2g f.
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