The magnitude of a given vector with end points $ (4, -4, 0)$ and $(-2, -2, 0)$ must be

Which of the following forces cannot be a resultant of $5\, N$ and $7\, N$ force...........$N$

Give the names of two methods for vector addition. Write the law of parallogram for vector addition.

If $\vec A$ and $\vec B$ are two non-zero vectors such that $\left| {\vec A + \vec B} \right| = \frac{{\left| {\vec A - \vec B} \right|}}{2}$ and $\left| {\vec A} \right| = 2\left| {\vec B} \right|$ then the angle between $\vec A$ and $\vec B$ is

If the magnitude of sum of two vectors is equal to the magnitude of difference of the two vectors, the angle between these vectors is ........ $^o$

$\vec{A}$ is a vector of magnitude $2.7$ units due east. What is the magnitude and direction of vector $4 \vec{A}$ ?