Demo Number 175
Location Shelf 6
Description Tape the two skates together with one piece of tape as shown in the picture. Use a wooden ruler to set masses at the same distance from the skates. Then use a knife to cut the tape, and the skates will hit two masses at the same time.  
 Related Demos
  • See what happens if you place some weight on one skate and repeat the demonstration.
  • You can use an incline plane board without a stand as a good surface for this demonstration.
  • If you will use a small piece of electrical tape, you do not need to cut it with a knife, tape will slide from one skate in 10 seconds or so.\
  • You will need:
    • Meter stick
    • Two 1000 g masses
    • Smooth surface
    • Set of weights
    • Electrical tape

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This Demo is Part of the following Categories: 5H20 Forces on Magnets, 1N20 Conservation of Linear Momentum