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Treebeard's Stumper
9 March 2001

Bicycle Tracks

We sure have had wild weather in Central California lately! We had 13+ inches of rain in one storm at my home in the mountains last week, enough to interfere with school and make us postpone our annual DMS Piece of Cake bike ride that should have been this weekend. Of course it's irresistible to ride through the mud after the heavy rains, and bikes leave such interesting tracks in the mud! Look at the pictures of my bike tracks below. Which track is my front wheel, and which is the rear? What direction was I riding? Hint: this is a geometry problem! Remember that the distance between my bike wheels is fixed, and only the front wheel can turn.

Here are my bike tracks in the mud at school. Which track is my
front wheel, and which is the rear? What direction was I riding?

Answer


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Copyright © 2001 by Marc Kummel / mkummel@rain.org