The weight of an aeroplane flying in the air is balanced by

Options :
  1. vertical component of the thrust created by air currents striking the lower surface of the wings
  2. force due to reaction of gases ejected by the revolving propeller
  3. Upthrust of the air which will be equal to the weight of the air having the same volume as the plane
  4. force due to the pressure difference between the upper and lower surface of the wing s created by different air speeds on the surface
Answer and Explanation :-

Answer: Option 4


Sorry there is no explanation for this answer. Please help others by posting your response below

How do you rate this queston?  Very Easy  Easy  Average  Above Average  Tough

Previous Question : On a stationary sail - boat , air is blown at the sails from a fan attached to the boat. The boat wi...

Next Question : A jet plane flies in the air because

Click here for online test on Motion


 (Getemail alerts when others member replies)

I'd never seen anything like it. First a trial, then a few murders, then dancing. Life goes on. Or, in this case, death continues.
-Charlaine Harris