Jet force

Jet force is the exhaust from some machine, especially aircraft, propelling the object itself in the opposite direction as per Newton's third law.

An understanding of jet force is intrinsic to the launching of drones, satellites, rockets, airplanes and other airborne machines.

A common wrong assumption is that the rocket elevates by pushing off the ground.

If this were the case, the rocket would be unable to continue moving upwards after the aircraft is no longer close to the ground.

Rather, the opposite force by the expelled gases is the reason for movement.

The "forward" component of this force is generally referred to as thrust.

[1] The upward component of jet force is referred to as lift.

Drag, which is also referred to as air resistance, is the force that opposes motion.

As such, it acts against both components of the jet force (both the thrust and the lift).

The fourth and final force is the weight itself, which acts directly downward.

Because θ ranges from 0° to 90° and the cosine of any angle in this range is 0 ≤ cos θ≤ 1, the thrust will always be either less than or equal to the jet force- as expected, as the thrust is a component of the jet force.

Of jet force, lift and thrust, we can find any one of these if the other two are given using the distance formula.

As such, jet force, thrust and lift are inherently linked.

[3] Weight is the downward force that the lift must overcome to produce upward movement.

In this equation, m represents the mass of the object and g is the acceleration that is produced by gravity.

To calculate the speed of the vessel due to the jet force itself, analysis of momentum is necessary.

Initially, both the gas in the propulsion system and the rocket are stationary, leading to v1 and v2 equaling 0.

Because we know all forces acting on it from this point on, we can calculate net acceleration using Newton's second law.