Mathematics

Problem

If the scalar projection of a non-zero vector

\vec{u}

on another non-zero vector

\vec{v}

equals zero, which of the following statements is necessarily true? a)

\vec{u} \text{ is parallel to } \vec{v}

\vec{u} \text{ is the zero vector}

\vec{u} \text{ is perpendicular to } \vec{v}

|\vec{u}| = |\vec{v}|