why is it that, if the cow is falling,we only notice the motion of the cow, but not the motion of the other object
When an object falls, its motion is affected by a force called gravity, which causes it to accelerate towards the Earth. The acceleration due to gravity is the same for every object, regardless of its mass.
Now, when a cow is falling, we primarily notice its motion because of its size, weight, and the fact that we are generally more interested in observing larger objects. The cow's motion becomes more apparent because it is comparatively larger and its fall will likely cause significant changes in its surroundings.
However, there are other objects present in the environment, which we may not notice as much while the cow is falling. These objects could be smaller, lighter, or located further away from our line of sight. Their motion may not catch our attention as readily as the larger, more prominent cow.
Also, our focus may be directed towards the falling cow due to our innate curiosity, concern for its safety, or simply because it is an unusual event to witness. This selective attention can make us less likely to notice the motion of other objects in the surrounding environment.
So, to summarize, while the cow's size and the attention it draws make its motion more noticeable, our selective focus and the characteristics of other objects in the environment can contribute to why we may not notice their motion as much during this particular event.