Describe the changes in the potential and kinetic energy of a pendulum as it swings back and forth.

The potential and kinetic energy of the pendulum is always equal throughout its swing.

The potential energy is maximum at the bottom of the arc, while the kinetic energy is maximum at the top of the arc.

The potential energy is maximum at the top of the arc, while the kinetic energy is maximum at the bottom of the arc.

The potential energy and kinetic energy remain constant throughout the swing.