lift is not perpendicular to wings but perpendicular to the apparent air velocity (direction of motion ). You got it right about drag.
Is the plane following a horizontal path with nose tipped up 30 degrees (or 30 minutes, I can not tell from your text) or is it climbing or diving?
Since lift is perpendicular to the direction of motion, it does no work.
(a) An airplane flies at constant speed along a
straight line at an angle of 30' with the
horizontal. The weight of the airplane is
80000 N and its engine provides a thrust of
100000 N in the direction of flight.
Determine the lift force perpendicular to the
airplane's wings and the force due to air
resistance opposite to the airplane's
direction of motion. Draw the free-body
diagram for the airplane. Identify the no-
work force from amongst the four forces
being exerted on the airplane.
1 answer
1 answer