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Law of Conservation of Mechanical Energy

What is the m...

Question

What is the minimum volume of a block of wood (density $= 850 k g / m^{3})$ if it is to hold a 50 kg woman entirely above the water when she stands on it ?

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Solution

Weight of both(block+woman)=upthrust on 100% volume of block
$∴$ $50 + V \times (850) = V \times (1000)$
$∴$ $V = 0.33$ m $^{3}$

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