A body of mass 800 gm is rotating in a circular path of radius $r$ with constant velocity. The work done in one complete revolution will be:

Circular motion is defined as the movement of an item along the perimeter of a circle or rotation along a circular route.

Uniform circular motion: Uniform circular motion is defined as circular motion in which the particle's speed remains constant. Force provides the centripetal acceleration in a homogeneous circular motion.

Assuming that,

Mass$=800\mathrm{gm}$, radius $=r$

Please keep in mind that the movement is circular and consistent. The angle formed by centripetal force and displacement is ${90}^o$ The force and displacement are perpendicular to each other

$\cos 90=0$

Work done $\left(w\right) = FS \cos 90°=0J$

So, regardless of mass, radius, or velocity, the work done is zero.

As a result, the effort done in one full rotation is equal to Zero Joule.