0:00
What is angular velocity omega in
0:02
physics? Angular velocity is the rate of
0:05
change of angular displacement of an
0:07
object with respect to time, including
0:09
the direction of rotation. Angular
0:12
velocity is a vector quantity, meaning
0:14
it has both magnitude and direction.
0:17
The direction is given by the axis of
0:20
rotation and can be determined using the
0:22
right-hand rule. It describes how fast
0:25
an object rotates and in which
0:28
Even if the speed remains constant, a
0:31
change in direction makes angular
0:33
velocity important in rotational motion.
0:36
The SI unit of angular velocity is
0:39
radians per second rad/s. Imagine a
0:42
spinning wheel at the top of a building.
0:43
Not only does it rotate, but it also has
0:46
a specific direction of rotation,
0:48
clockwise or anti-clockwise.
0:51
This is what angular velocity describes.
0:54
Examples: rotation of a ceiling fan with
0:57
direction, spinning of a wheel in a
0:59
specific direction, Earth rotating about
1:02
its axis, motion of rotating machinery,
1:05
a disc rotating clockwise or
1:07
anti-clockwise {asterisk}{asterisk}.