iÂ·deÂ·a. n. 1. Something, such as a thought or conception, that is the product of mental activity. 2. An opinion, conviction, or principle: has some strange political ideas. 3. A plan, purpose, or goal: She started school with the idea of becoming a doctor. 4.
The direction of the thrust is normally along the longitudinal axis of the rocket through the rocket center of gravity. But on some rockets, the exhaust nozzle and the thrust direction can be rotated, or gimbaled. The rocket can then be maneuvered by using the torque about the center of gravity. The magnitude of the thrust can be determined by the general thrust equation.
Let's take the forces one-at-a-time starting with Thrust. 1. Thrust - is provided by the propeller or jet engine; thrust acts to move the plane forward into the air. 2. Lift - As the plane moves forward the shape of the wing (airfoil) causes a pressure difference that exerts an upward force on the wing -- the lift force.