THE FOUR FORCES ACTING ON AN AIRPLANE An airplane in flight is the center of a continuous tug of war between four forces : lift , gravity force or weight , thrust , and drag .
(An airplane in flight; is; the center of a continuous tug of war between four forces) (flight; is the center of; a continuous tug)
An airplane in flight flight
is is the center of
the center of a continuous tug of war between four forces
a continuous tug