The Forces of Flight

Today for inquiry we learnt about the physics of flight. This is my DLO I have made on flight. Lift and thrust is what makes the plane go up and drag plus weight keeps the plane down. Gravity also keeps the plane from coming off the face of the earth. Like if a planes engine stopped working, it wouldn't float to the left or the right, it would crash straight into the ground. That it because gravity pulls thing to the earth. We also learnt Newton's first law ( which is on my DLO too ).