The Kinetic Energy of a body moving along a horizontal circle remains same at every point .Is it true for a vertical circle also/

Does the kinetic enregy of a body remain constant during motion in a vertical circle?

Why does the total energy remain constant during motion in a vertical circle?

Is every chord of a circle also a diameter?

For a particle moving in vertical circle,the:

Find the expression for velocity at highest point in a vertical circle.

A massless string of length 1.2 m, has a breaking strength of 2 kg wt. A stone of mass 0.4 kg, tied to one end of the string, is made to move in a vertical circle, by holding the other end in the hand. Can the particle describe the vertical circle? (Take g = 10 m s^-2 )