Fun with Mechanics
1 The Magic Can
How about making a can that rolls, stops, and obediently comes back to you?
Step By Step
Screw the nut on all the way to the head of the bolt. Make a loop in the middle of the elastic and knot it around the “foot” of the bolt. Make holes in the centers of the lid and bottom of the can. Put one end of the elastic through the hole in the bottom of the can and fasten it with a knot or use one of the nails (see figure). Stretch the elastic and pass the other end through the hole in the lid, fastening it the ...
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