Rotational Dynamics — Physics STD 12 Science — Question

A body revolving in a vertical circle in the gravitational field of the Earth is said to perform vertical circular motion.
A vertical circular motion controlled only by gravity is a nonuniform circular motion because the linear speed of the body does not remain constant although the motion can be periodic.
In a controlled vertical circular motion, such as that a body attached to a rod, the linear speed of the body can be constant (including zero) so that such a motion can be uniform and periodic.