An inappropriate frame of reference refers to a chosen perspective or coordinate system that is not suitable or relevant for accurately describing the motion of objects or events. In physics, selecting the right frame of reference is crucial for understanding and analyzing motion. An inappropriate frame of reference can lead to confusion, incorrect interpretations, or unnecessary complexities in describing the example(s) of motion.
For instance, let's consider describing the motion of a car traveling on a straight road. One inappropriate frame of reference might be using the car itself as the frame of reference. In this case, if the car is moving at a constant speed, an observer inside the car might perceive the car as stationary, while objects outside the car would appear to be moving backward. This perspective doesn't provide a clear understanding of the car's actual motion relative to the road and its surroundings.
Another example could be describing the motion of a plane flying at a high altitude. If we choose a frame of reference fixed to the Earth's surface, it might appear as if the plane is hovering or moving slowly, even though it could be traveling at hundreds of miles per hour relative to the ground. This perspective doesn't accurately represent the plane's true motion in the context of air travel.
In both cases, the chosen frame of reference fails to capture the relevant aspects of the motion. Inappropriate frames of reference can lead to difficulties in calculations, misinterpretations of speed and direction, and an overall lack of clarity in describing the observed motion. To accurately describe motion, it's important to select a frame of reference that minimizes unnecessary complexities and aligns with the nature of the motion being observed. Typically, inertial frames of reference (frames that are not accelerating) are preferred for describing motion accurately in most scenarios.