Question
Projection of vector $\vec A$ on $\vec B$ is
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Answer
The projection of $\vec{A}$ on $\vec{B}$ is a vector with length $P Q$ which begins at $P$ in the same direction as $\vec{B}$.
The projection of $\vec{A}$ on $\vec{B}$ is defined as $\frac{\vec{A} \cdot \vec{B}}{|\vec{B}|}=\vec{A} \cdot \hat{B}$
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