The null vector, also called the zero vector, is a vector a, such that a+b=b for any vector b.
Also, b+( -b)=aAn example in R3 is the vector <0,0,0>Here are some examples of its...
A freely falling body, as the name implies, is not hindered in its fall. "Not hindered" is to be understood as not appreciatively hindered for the purposes of describing its motion with a simple...