What is the angular momentum of a rod with a mass of #15 kg# and length of #6 m# that is spinning around its center at #23 Hz#?
The moment of inertia of a thin rod about an axis through its centre is given by (can be proven - ask if you want me to show you the derivation)
The angular velocity of the rod is given by
Hence the angular momentum is given by
The direction hereof may be obtained by the right hand rule - curl the fingers of your right hand in the direction of the rotation and your thumb will point in the direction of the angular momentum