This old PSSC style 'Circular Motion' or 'Centripetal Force' system is normally performed outdoors. Please refer to MF0848-001 for a better system and far better accuracy.
This PSSC kit consists of a glass handle (low friction) and a cord with weights (metal washers) and paper clip, rubber stopper, a wood dowel and an alligator clip.
See the PDF file below for more information and the experiment.

Instruction Sheet