question_answer

Given\[\vec{A}+\,\vec{B}+\vec{C}+\vec{D}=\vec{0}\], can the magnitude of \[\vec{A}+\,\vec{B}+\vec{C}\]be equal to the magnitude of\[\vec{D}\]. Explain.

Answer:

                Force is a vector quantity. The two forces can be added by laws of vectors; parallelogram law of vectors or triangle law of vectors which is possible if we know the angle between the two forces. As the angle between the two given forces is not known, hence, they cannot be added.