The perception of speed can be influenced by various factors, including visual cues, acceleration, and relative motion. When it comes to the sensation of speed during different phases of a flight, such as takeoff and cruising, several factors contribute to the way it is perceived.
During takeoff, you experience a rapid acceleration as the plane gains speed on the runway. This sudden increase in velocity can create a sense of excitement and make you feel that the plane is moving quickly. Additionally, the close proximity to the ground during takeoff allows for a more noticeable reference point, such as trees, buildings, or other objects, which can enhance the perception of speed.
Once the plane is airborne and reaches its cruising altitude, the acceleration decreases, and the plane levels off. At this point, the visual cues that typically indicate speed become less pronounced. The absence of nearby objects, along with the vastness of the sky, makes it difficult for our brains to perceive motion relative to the ground. As a result, the sense of speed diminishes, and the flight may feel slower than it actually is.
Another factor is the relatively constant velocity during the cruising phase. Once the plane reaches its desired speed, it maintains a relatively stable rate of travel, which can further contribute to the perception of reduced speed. Our brains are more attuned to changes in velocity rather than constant speed, so the absence of acceleration or deceleration can make the flight seem slower.
It's important to note that these perceptions are subjective and can vary from person to person. Factors like personal sensitivity, previous experiences with flying, and individual expectations can also influence how fast or slow a flight feels to an individual.