A block of wood weighing $71.2 N$ and of specific gravity $0.75$ is tied by a string to the bottom of a tank of water in order to have the block totally immersed. What is the tension in the string?

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Solution

T+weight=upthrust
$∴$ T=upthrust weight
$= (71.2) (\frac{1}{0.75}) - 71.2$
$= 23.7$ N

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A block of wood weighing 71.2N and of specific gravity 0.75 is tied by a string to the bottom of a tank of water in order to have the block totally immersed. What is the tension in the string?

T+weight=upthrust∴ T=upthrust weight =(71.2)(10.75)−71.2 =23.7 N

A block of wood weighing $71.2 N$ and of specific gravity $0.75$ is tied by a string to the bottom of a tank of water in order to have the block totally immersed. What is the tension in the string?

T+weight=upthrust
$∴$ T=upthrust weight
$= (71.2) (\frac{1}{0.75}) - 71.2$
$= 23.7$ N