Why, when a sparrow flies up from a branch, it deviates downward?

At the moment of takeoff, the branch deflected against the direction of the bird’s movement. The total speed of the bird – branch system was zero. External bodies did not act on it, which means that when speed appears in the bird, the branch should also have a speed, but opposite in sign.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.