Which one is correct? tough statics-physics question!?

Question

plane is flying in the air can be modeled like a particle. Which of the following forces should be included on the free body diagram?

A. the thrust from the engines

B. the friction of the air

C. the weight of the plane

D. the lift from the wings

please respond asap!

Answer 1

Lewi above has the absolute correct response.

Answer 2

All of those forces should be included. They are all acting on the plane at the same time.

Although "the friction of the air" should definitely be referred to as drag.