How can you relate a flight of an airplane to newton's third law?

Question

How can you relate a flight of an airplane to newton's third law?

Answer 1

Newton's third law states that for every action,there is an equal and opposite reaction.So in flight,the engines are the one that is obeying this law to thrust the aircraft foward.When the turbine sucks in air,high velocity gas from the combustion chamber will be thrusted backwards.This means that for an aircraft to move,it will require a force that is opposing it.Same example like a rocket.The thrust will be acting downwards,pushing the rocket up.

Hope it helps.

Answer 2

Lift, too, to an extent. The "downwash" aft of the trailing edge is the "action", as angle of attack is increased, within flyable AOA ranges.

Edit: I see someone had voted down my response. Well, thrust is an obvious example. The role of Newtonian physics in lift is less obvious and less well-known. Here is a corroborating source:

http://www.physics.ohio-state.edu/~wilki...

Answer 3

Daxmin and Firebird have given excellent answers.

I would also add that responses due to the aircraft's control surface deflection are because of Newton's third law.

Answer 4

The usual method of propulsion that airplanes use is they propel themselves forward by throwing air backward.  This is true of propeller and jet airplanes.

So this is a very good example of newton's third law.