AXIS OF ROTATION:
The axis of rotation refers to an imaginary line around which an object rotates or spins. In simple terms, it's the central line about which an object's movement occurs. Think of it as the pivot point for rotational motion. For instance, when a wheel spins, the axis of rotation is the center of the wheel. Similarly, the Earth rotates around an axis, which passes through the North and South Poles. Understanding the axis of rotation is crucial in fields like physics, engineering, and astronomy, as it helps describe the rotational behavior of objects and systems.
Angular displacement:Angular displacement refers to the change in the position or orientation of an object as it rotates around a fixed axis. It's measured in radians or degrees and represents the angle swept by the object as it moves from its initial position to its final position.
from fig(2)With r fixed if \(\theta\) is varied ,we arrive at rotational motion,i.e., particle P rotates in a circle of radius r. \(\theta\)is increasing in anticlockwise direction and is taken as positive where as \(\theta\) in clockwise direction is taken as negative.Obviously
\(
\theta = \frac{S}
{r}
\)in radius