Unit vector parallel to the resultant of vectors $\vec A = 4\hat i - 3\hat j$and $\vec B = 8\hat i + 8\hat j$ will be
$\frac{{24\hat i + 5\hat j}}{{13}}$
$\frac{{12\hat i + 5\hat j}}{{13}}$
$\frac{{6\hat i + 5\hat j}}{{13}}$
None of these
Explain commutative law for vector addition.
The vectors $5i + 8j$ and $2i + 7j$ are added. The magnitude of the sum of these vector is
$\overrightarrow A \, = \,2\widehat i\, + \,3\widehat j + 4\widehat k$ , $\overrightarrow B \, = \widehat {\,i} - \widehat j + \widehat k$, then find their substraction by algebric method.
Prove the associative law of vector addition.
What is the angle between $\overrightarrow P $ and the resultant of $(\overrightarrow P + \overrightarrow Q )$ and $(\overrightarrow P - \overrightarrow Q )$