PIRA Classification: 1R20.10
Description: A 1 kg mass hanger hangs on a length of copper wire. Large masses (.5-1.5 kg) are added to the hanger. The wire will stretch quite a bit near its failure point. It takes about 7-8 kg to break the wire.
Special Instructions: Add the 1 and 2 kg masses first (a total of 3 or 4). Then add the 0.5 kg masses until the wire breaks.
Setup time: 5 minutes
Safety Issues: Watch your hands when wire breaks.