What is unit vector ? Explain.
When three forces of $50 \,N, 30\, N $ and $15\,N$ act on a body, then the body is
Let $\theta$ be the angle between vectors $\vec{A}$ and $\vec{B}$. Which of the following figures correctly represents the angle $\theta$ ?
A vector is represented by $3\,\hat i + \hat j + 2\,\hat k$. Its length in $XY$ plane is
The change in a vector may occur due to .....