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Q. The projection of $\overrightarrow{P}\,on\,\overrightarrow{Q}$ is

Motion in a Plane

Solution:

Projection of $\overrightarrow{P}$ on $\overrightarrow{Q}$ is P cos $\theta$, where $\theta $ is the angle between $\overrightarrow{P} $ and $\overrightarrow{Q}$ . Also, P cos $\theta = \overrightarrow{P} . \hat{Q} .$