Iron bob with hook for pendulum attachment.

• Iron pendulum bob
• Brass hook on bob for attachment to pendulum arm

The iron pendulum bob provides one of the necessary tools for studying the physics of pendulum motion (tension force, gravity force, centripetal force, potential energy, kinetic energy, etc.). When used with a full pendulum set up, it provides a visually and kinesthetically affective method by which to study pendulum physics.