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AP EAMCET202017 Sep 2020Evening ShiftPhysicsMechanical Properties of FluidsActual

A fully loaded Boeing air craft has a mass of (3.3 10^5 ~kg ). Its total wing area is (500 ~m ^2 ). It is in level flight with a speed of (960 ~km / h ). Estimate the pressure difference between the lower and upper surfaces of the wings.

Options

  1. A(4.5 10^3 Nm ⁻² )
  2. B(5.5 10^3 Nm ⁻² )
  3. C(6.5 10^3 Nm ⁻² )
  4. D(7.5 10^3 Nm ⁻² )

Correct answer

C. (6.5 10^3 Nm ⁻² )

Step-by-step solution

Mass of boeing air craft, (M=3.3 10^5 ~kg ) Wing's area, (A=500 ~m ^2 ) The weight of boeing aircraft is balanced by upward force due to the pressure difference. Hence, ( p A=m g ) ( aligned p & = m g A = 3.3 10^5 9.8 500 & =6.47 10^3 ~N / m ^2 6.5 10^3 ~N / m ^2 aligned )

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