Northwestern Physics Demos                                 Go back to Mechanics
DCS# 1D50.20NWU# M-30cLocation    3A3
title:    Centrifugal Force Tube
aka:  Physics Numchuck or Whirligig

Two balls are attached to a string through a tube.  The heavier ball can be held up by spinning the lighter ball in a horizontal circle.  The radius can be varied, and more weight can be attached to the hanging ball if needed.

   What are the action/reaction forces acting on the spinning ball and the hanging ball?
pix of plastic rocket in tray