The value of a unit vector in the direction of vector $A = 5\hat i - 12\hat j,$ is
$\hat i$
$\hat j$
$(\hat i + \hat j)/13$
$(5\hat i - 12\hat j)/13$
Pick out the two scalar quantities in the following list :
force, angular momentum, work, current, linear momentum, electric field, average velocity, magnetic moment, relative velocity.
The angle between vectors $\vec a$ and $\vec b$ is $\frac{\pi }{6}$. The angle between vectors $ - 3\vec a$ and $ 2\vec b$ is
Find the unit vector of a vector whose co-ordinates are $(8,\, 6)$.
Angular momentum is
State, for each of the following physical quantities, if it is a scalar or a vector : volume, mass, speed, acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity.