Rotational motion about a fixed axis is a type of motion in which an object rotates around a fixed axis, such as a wheel rotating around its axle. This motion is different from translational motion, where an object moves in a straight line.
Angular velocity is a measure of how quickly an object is rotating around a fixed axis, while linear velocity is a measure of how quickly an object is moving in a straight line. Angular velocity is measured in radians per second, while linear velocity is measured in meters per second.
Angular acceleration is directly proportional to the torque applied to an object. This means that the greater the torque applied, the greater the angular acceleration will be.
Moment of inertia is a measure of an object's resistance to rotational motion. The greater the moment of inertia, the more difficult it is to change an object's rotational motion. In rotational motion about a fixed axis, the moment of inertia is a crucial factor in determining the object's rotational behavior.
Centripetal force is the force that keeps an object moving in a circular path, directed towards the center of the circle. It is responsible for the curved motion of objects in rotational motion about a fixed axis. Centrifugal force, on the other hand, is a fictitious force that appears to push an object away from the center of rotation. It is actually the result of inertia and is not a true force.