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Q.

The pressure on the top surface of an aeroplane wing is 0.7×103pa  and the pressure on the bottom surface is 0.75×103pa . If the area of each surface is 50m2.  The dynamic lift on the wing is

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a

25×104N

b

0.5×104N

c

5×104N

d

0.25×104N

answer is D.

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Detailed Solution

F=A(p1−p2)=50(0.75×103−0.7×103)=0.25×104N
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The pressure on the top surface of an aeroplane wing is 0.7×103pa  and the pressure on the bottom surface is 0.75×103pa . If the area of each surface is 50m2.  The dynamic lift on the wing is