When the Vector Sum of Three Co-Planar Forces $\vec{A}$ $\overrightarrow{\mathbf{B}}$ And $\overrightarrow{\mathbf{C}}$

Multiple Choice

When the vector sum of three co-planar forces, $\vec{A}$ , $\overrightarrow{\mathbf{B}}$ and $\overrightarrow{\mathbf{C}}$ , is parallel to $\vec{A}$ , we can conclude that $\overrightarrow{\mathbf{B}}$ and $\overrightarrow{\mathbf{C}}$ :

A) must sum to zero.
B) must be equal and opposite.
C) must have equal and opposite components perpendicular to $\vec{A}$ .
D) must have equal and opposite components parallel to $\vec{A}$ .
E) must have equal and opposite components parallel and perpendicular to $\vec{A}$ .