In a test experiment on model airplane in a wind tunnel, the flow of air speed on the upper and lower surfaces of the wing are 70 ms–1 and 63 ms–1 respectively. What will be lift on wing of area 4 m2? (ρair = 1.3 kg m–3)

 In a test experiment on model airplane in a wind tunnel, the flow of air speed on the upper and lower surfaces of the wing are 70 ms–1 and 63 ms–1 respectively. What will be lift on wing of area 4 m2? (ρair = 1.3 kg m–3)

	2.42 kN
	1.73 kN
	5.84 kN
	3.72 kN