A simple pendulum consists of a small metallic ball or a piece of stone suspended from a rigid stand by a thread. This suspended metallic ball is known as the _____ of the pendulum.

Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R). In light of the statements, choose the correct answer: Assertion (A): In simple harmonic motion, the potential energy of the particle is maximum at the extreme positions. Reason (R): At the extreme positions, the velocity of the particle is maximum.

If V, A, and X are the velocity, acceleration, and displacement respectively of a particle executing simple harmonic motion, then at the mean position: