Question -
During test-run, air flows at 215 m/s velocity and 25 degree Celsius temperature past a smooth thin model airfoil which can be idealized as a flat plate. If the chord length of the airfoil is 15 cm, find drag per unit width. The relevant physical properties of air are p = 1.82 kg/m³ v = 15.53 * 10¯⁶ m²/s
Options:
A .  25.42 N per unit width
B .  35.42 N per unit width
C .  45.42 N per unit width
D .  55.42 N per unit width
Answer: Option A Answer: (a).25.42 N per unit width
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