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The density of a body is \(5\times10^3kgm{^-3}\) and it weighs 1N in air. Calculate the...

Physics
WAEC 1994

The density of a body is \(5\times10^3kgm{^-3}\) and it weighs 1N in air. Calculate the apparent weight of the body when totally immersed in water. (Density of water =\(10^3kgm{-3}, g= 10ms^{-2}
  • A. 0.02N
  • B. 0.08N
  • C. 0.20N
  • D. 0.80N
  • E. 1N
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Correct Answer: Option D
Explanation
Upthrust = weight of the water displaced =pvg= 1000 x 2 x \(10^{-5}\)=0.20N \\ Apparent weight = weight in air – upthrust = 1-0.2N=0.8N

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