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When a plane is in flight, the forces acting on it play a crucial role in its movement. Let's break down the forces acting on the plane at a distance based on the given options:
1. **Drag**: Drag is a force that acts opposite to the direction of the plane's motion. It is caused by air resistance and affects the speed and efficiency of the aircraft. However, drag does not act on the plane at a distance; instead, it is a force that opposes motion.
2. **Lift**: Lift is the force that acts perpendicular to the plane's wings and is responsible for keeping the aircraft airborne. It is generated by the wings as air flows over them, creating a pressure difference that lifts the plane. Lift acts on the plane at a distance by supporting its weight and enabling flight.
3. **Weight**: Weight is the force exerted by gravity on the plane and is directed towards the center of the Earth. It acts on the plane at a distance by pulling it down towards the ground. Weight is crucial in determining the aircraft's ability to take off, maintain altitude, and land safely.
4. **Thrust**: Thrust is the force produced by the plane's engines that propels it forward. It acts in the direction of motion and counteracts drag. While thrust is essential for overcoming drag and enabling the aircraft to move forward, it does not act on the plane at a distance in the same way as lift and weight do.
In conclusion, the force that acts on the plane at a distance is **weight**. Weight pulls the plane down towards the ground due to gravity, while lift counters it to keep the aircraft in the air. Both weight and lift are fundamental forces that impact the flight of a plane significantly.
