Q. Aerofils are so designed that the speed of air
A) On top side is more than on lower side
B) On top side is less than on lower side
C) Is same on both sides
D) Is turbulent
Explanation
(a) The aerofils are so designed that
$P_{upper\ side} < P_{lower\ side}$
So that the aerofils get a lifting force in upward direction. According to Bernoulli’s theorem, where the pressure is large, the velocity will be minimum or $vice$-$versa$
Thus,$\ V_{upper\ side} > v_{lower\ side}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.