Question

diagrammatically explain how law of conservation of energy is applied to the motion of a simple pendulum

Answer 1

let us take a simple pendulum with positions in theft extreme as A and middle as B and right extreme as C. so the mechanical energy at A is the sun of potential energy and kinetic energy that is
potential energy= mgh and kinetic energy= zero as velocity is zero
At c,,
potential energy is 0 and kinetic energy is mgh.