My Physical Science class had our annual
bridge breaking contest yesterday.
I give the student the balsa wood and
rules (no more than 25 grams, length
and width)...everything else is pretty
much up to them. We go over the forces
involved before they begin building.
I'm always impressed..

This year's winner (it held all my weights -
about 35 pounds total - I'm going to have
to buy more lead pellets!).



And (in my opinion) the best looking
bridge of the lot:



All 8 of my students did a great job!
Pax