3-1.Vectors
easy

Projection of vector $\vec A$ on $\vec B$ is

A

$\mathop A\limits^ \to .\mathop B\limits^ \to $

B

$\mathop A\limits^ \to .\hat B$

C

$\mathop B\limits^ \to .\mathop A\limits^ \to $

D

$\hat A.\hat B$

Solution

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 $\frac{\vec{A} \cdot \vec{B}}{|\vec{B}|}=\vec{A} \cdot \hat{B}$

Standard 11
Physics

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