9.14 In a test experiment on a model aeroplane in a wind tunnel

PHYSICS · Subjective · CBSE · Physics · Mechanical Properties of Fluids · Mechanical Properties of Fluids

Problem

9.14 In a test experiment on a model aeroplane in a wind tunnel, the flow speeds on the upper and lower surfaces of the wing are

70 \mathrm{~m} \mathrm{~s}^{-1}

and

63 \mathrm{~m} \mathrm{~s}^{-1}

respectively. What is the lift on the wing if its area is

2.5 \mathrm{~m}^{2}

? Take the density of air to be

1.3 \mathrm{~kg} \mathrm{~m}^{-3}