First slide

Fluid statics

Question

A wooden cylinder floats vertically in water with half of its length immersed. The density of wood is:

Easy

A

equal to that of water
B

half the density of water
C

double the density of water
D

the question is incomplete

Solution

Weight is equal to upthrust force if σ= density of water and ρ is the density of wood then Vρg= $\frac{V}{2}$ σg there fore ρ= $\frac{σ}{2}$

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