Bibliography
Jason Hoisington
Phys 212
3/21/05
http://www.newton.mec.edu/Brown/TE/CATAPULTS/Catapult_history.html

http://www.howstuffworks.com/

http://www.redstoneprojects.com/trebuchetstore/trebuchet_history.html

http://www.dl.ket.org/latin1/gallery/military/ballista.htm

http://www.dl.ket.org/latin1/gallery/military/ballista.htm

http://www.algobeautytreb.com/

Serway, Raymond, and Jewett, John.  Physics for Scientists and Engineers. Belmont: Brooks/Cole, 2004.

 Macaulay, David.  The Way Things Work.  Boston: Houghton Mifflin Company, 1988

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Ballista
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Bibliography