Stringless Pendulum (LSE) The stringless pendulum demonstrates simple harmonic motion in a way that doesn't seem so tied down. Students will see the period of an oscillating body from a different perspective than the standard string and ball. The period of the 1 inch steel ball can be measured, and the distance to a focal point can be calculated to compare the demonstration to a classic pendulum. Includes pendulum track, 1 inch steel ball, and instructions. Qty :