Setup: Tie the piece of string around the middle of the metal bar which still has the coloured plastic sleeve in place [it gives the string traction). Hang the metal bar from the retort stand by tying the string to a clamp. The photo below shows you how to do this. Slide the string along the metal bar until it will hang horizontally. :4; 1r coloured plastic sleeve Attach the bulldog clips to the metal bar and hang a mass carrier off each bulldog clip. Activities and Questions: 1) What is the torque produced by the balanced bar alone? :I