First slide

Fluid statics

Question

A block of metal ( density 7 g/cc) of size 5 cm x 5 cm x 5 cm is weighed completely submerged in water. What will be its apparent weight (density of water = 1 g/cc)?

Easy

A

(6 X 5 X 5 X 5) g
B

(4 X 4 X 4 X 7) g
C

(7 X 5 X 5 X 5) g
D

(4 X 4 X 4 X 6) g

Solution

$W_{app} = W - Th = V (ρ - σ) g = 5 \times 5 \times 5 (7 - 1) g = 5 \times 5 \times 5 \times 6 g$

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