The center of rotation is the fixed point or axis around which an object rotates or spins. It can be a physical point within the object or an external reference point.
Rotational motion describes the movement of an object as it turns or spins around a fixed axis.
Moment Arm: Moment arm, also known as lever arm, is the perpendicular distance from an applied force to the center of rotation. It determines how much torque is produced by that force according to its magnitude and direction.