Q.
Water flows steadily through a horizontal pipe of variable cross-section. If the pressure of water is P at a point where flow speed is v, the pressure at another point where the flowspeed is 2v, is : (take density of water as ρ)
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a
P-3ρv22
b
P-ρv22
c
P--3ρv24
d
P-ρv2
answer is A.
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Detailed Solution
P1+ρV212=P2+ρV222 P2=P+ρ(V2-4V2)2
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