Measure passive damping with a Motion Sensor This building frame is built with an Advanced Structures Set using the Flat Beams. A pendulum with drag caused by strings is suspended from the top of the building. The Motion Sensor is positioned to record the oscillation of the building. The gray graph (in PASCO Capstone™ Software) shows the oscillation without the pendulum. The red graph shows the damping caused when the pendulum is allowed to oscillate.