Final answer:
Rotational motion is the motion of an object around an axis. Angular momentum is the rotational equivalent of linear momentum, and it is calculated using the moment of inertia and angular velocity.
Step-by-step explanation:
Rotational motion refers to the motion of an object around an axis. It involves the rotation of an object instead of linear motion.
Angular momentum is the rotational equivalent of linear momentum.
It is a measure of the motion of a rotating object in terms of its speed and how widely the object's mass is distributed around its axis.
Angular momentum is calculated by multiplying the moment of inertia of an object by its angular velocity.