Consider a vector $F =4 \hat{ i }-3 \hat{ j }$. Another vector perpendicular of $F$ is
$4 \hat{ i }+3 \hat{ j }$
$6 \hat{ i }$
$7 \hat{ k }$
$3 \hat{ i }-4 \hat{ j }$
If the angle between two vectors $A$ and $B$ is $120^{\circ}$, its resultant $C$ will be
The vector sum of two forces is perpendicular to their vector differences. In that case, the force
The angle between the two vectors $\vec A = 3\hat i + 4\hat j + 5\hat k$ and $\vec B = 3\hat i + 4\hat j + 5\hat k$ is ....... $^o$
A boat is sent across a river with a velocity of $8\, km/hr$. If the resultant velocity of boat is $10 \,km/hr$, then velocity of the river is ........$km/hr$