The change in a vector may occur due to .....
Rotation of frame of reference
Translation of frame of reference
Rotation of vector
Both $(a)$ and $(c)$
A physical quantity which has a direction
Any vector in an arbitrary direction can always be replaced by two (or three)
Explain null vector. Explain the physical significance of null vector.
A particle is moving with speed $6\,m/s$ along the direction of $\vec A = 2\hat i + 2\hat j - \hat k,$ then its velocity is
If $\overrightarrow A = 2\hat i + 4\hat j - 5\hat k$ the direction of cosines of the vector $\overrightarrow A $ are