In your group, have someone donate temporarily
a set of keys for the cause. Tie one end of a string about a
meter long to the ring. To the other end attach a light weight,
such as a paper clip or binder clip. If you hold the clip in
your hand with the keys hanging on the string from your
hand and drop it, everything of course falls to the ground.
Now try something different. Suspend the keys from a
horizontal pencil held in your left hand so that they hang
down from the pencil on a short segment of the string as
shown in Figure TP11.1. The rest of the string lies over the
pencil and extends horizontally to the binder clip, which
you hold with your right hand. Now release the binder clip.
What happens? Explain this result.
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