* Constant Velocity: The key phrase here is "cruising at constant velocity." This means the jumbo jet is moving at a steady speed in a straight line.
* Newton's First Law: Newton's First Law of Motion states that an object at rest stays at rest, and an object in motion stays in motion at a constant velocity unless acted upon by a net force.
* Balanced Forces: Since the jumbo jet is cruising at constant velocity, the forces acting on it must be balanced. The thrust from the engines is being countered by other forces like air resistance (drag) and possibly a slight downward force due to gravity.
* Zero Acceleration: Acceleration is the rate of change of velocity. If the velocity is constant, the acceleration is zero.
In summary: Even though the engines are producing a significant thrust force, the jumbo jet's acceleration is zero because the forces acting on it are balanced.
