Practice Surface Tension - GATE & ESE - ME & CH Offered by Unacademy

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Surface Tension

Quick practice

Question 1 of 5

An aircraft is flying in level flight at a speed of 200km/hr through the air (density, $\rho=1.2 \mathrm{~kg} / \mathrm{m}^2$ , and viscosity $\left.\mathrm{m}=1.6 \times 10^{-5} \mathrm{~N}-\mathrm{s} / \mathrm{m}^2\right)$ . The lift co-efficient at this speed is 0.4 and the drag coefficient is 0.0065. The mass of the aircraft is 800kg. The effective lift area of the aircraft is [2004]

A

$2.2 \mathrm{~m}^2$

B

$10.6 \mathrm{~m}^2$

C

$21.2 \mathrm{~m}^2$

D

$1.1 \mathrm{~m}^2$