Question

A pendulum is oscillating freely. Its bob has:

Options

• only kinetic energy

• maximum kinetic energy at extreme position

• maximum potential energy at its mean position

• a constant energy, which is the sum of potential and kinetic energy

Answer 1

A constant energy, which is the sum of potential and kinetic energy

Explanation:

As the pendulum swings, potential energy changes into kinetic energy and back again. The total mechanical energy remains constant. The bob has maximum kinetic energy at the mean position and maximum potential energy at the extreme positions.