The Harmonic Motion Spring is easy to use and affordable, making it an excellent introduction to simple harmonic motion.

The harmonic motion spring's elongations are closely proportioned to the applied forces, making it easy to use. The windings of this truncated cone, made of spring brass wire, interfere with each other less than those of a helical spring, making the motion truly sinusoidal. The spring is 18cm long with a maximum diameter of 3.9cm and a spring constant (k) of 9.6N/m.

Supports and slotted masses also required; five 0.5N masses are suggested.