Question

Самолет летит с постоянной скоростью 750 км\ч на одинаковой высоте относительно Земли.Сравните силы,действующие на самолет

Answer 1

подъемная сила,сила тяги двигателя,лобовое сопротивление,вес самолета; 

Answer 2

Forces Acting on the Airplane

When an airplane is flying at a constant speed of 750 km/h at a consistent altitude relative to the Earth, several forces are acting on it. Let's examine these forces in more detail:

1. Thrust: The airplane's engines generate thrust, which propels the aircraft forward. This force counteracts the drag force and allows the airplane to maintain its speed. 2. Drag: Drag is the resistance force that opposes the motion of the airplane through the air. It is caused by the interaction between the airplane and the air molecules. The drag force depends on factors such as the shape of the airplane, its speed, and the air density. To maintain a constant speed, the thrust force must be equal to the drag force. 3. Weight: The weight of the airplane is the force exerted on it due to gravity. It acts vertically downward and is equal to the mass of the airplane multiplied by the acceleration due to gravity. The weight of the airplane is balanced by the lift force. 4. Lift: Lift is the upward force that opposes the weight of the airplane. It is generated by the interaction between the wings and the air flowing over them. The shape of the wings, the angle of attack, and the speed of the airplane affect the lift force. To maintain a constant altitude, the lift force must be equal to the weight of the airplane. 5. Centripetal Force: If the airplane is flying in a curved path, there is a centripetal force acting towards the center of the curve. This force is required to keep the airplane on its curved path and is provided by the horizontal component of the lift force. It's important to note that these forces are in equilibrium when the airplane is flying at a constant speed and altitude. The thrust force balances the drag force, and the lift force balances the weight of the airplane. The centripetal force is only present when the airplane is flying in a curved path.

I hope this explanation helps! Let me know if you have any further questions.