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Contributor links
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Books
Army Engineering
http://usite.army.mod.uk/REME
Richard Little, one of the Experts, is a Royal Electrical and Mechanical Engineer for the British Army. The MOD's website can tell you everything about their role.
Artefacts UK
www.artefacts.uk.com
Paul Denney, one of the Experts, is an historian for this organisation that reconstructs the past.
The Star Gun Company
www.starguncompany.co.uk/index.html
Website of Colin Herriett, the judge on this programme. His company makes faithful reproductions of guns.
Castle Siegecraft and Defence
www.castlewales.com/siege.htmls
Looks at castle warfare and weaponry in the Middle Ages, with photographs and drawings.
Centripetal vs Centrifugal Forces
www.newton.dep.anl.gov/askasci/phy00/phy00305.htm
American website in which simple physics questions are discussed and answered by scientists. Here, Dr Ken Mellendorf of Illinois Central College defines centripetal and centrifugal force and explains that centrifugal force is not actually a force at all.
The Grey Company
http://members.iinet.net.au/~rmine
Historical re-enactment group based in Perth, Australia. This page provides you with everything you want to know about trebuchets, including pictures, mathematical models for the weapon and plans for table-top models that you can build. There is also information about medieval warfare and costume-making for re-enactments and an extensive list of links.
Physics
www.infoplease.com/ce6/sci/A0805934.html
Offers a straightforward definition of ballistics, including projectiles and trajectories
Physlink.com
www.physlink.com/Education/AskExperts/ae150.cfm
Clear and concise explanations of centrifugal force, centripetal force and velocity.
Pumpkin Chunkin
www.cannon-mania.com/pumpkin_chunkin.htm
Website devoted to the design of cannons built to fire pumpkins. This sport has become so popular that it attracted 30,000 visitors at one international event. The site has information and photographs of the cannons.
Pumpkin Hurling
www.bustifire.com/pkhurling
Information on the pumpkin hurling events that have taken place in October for the last few years in Busti, New York.
Racing Glossary
www.hpiracing.com/glossary.htm
The glossary on this site for radio-control car enthusiasts explains the terms axle, acceleration and suspension arm among others.
Winching
www.wheels24.co.za/Wheels24/4x4/4x4_Tips/
0,,1369-1395-1502_1377806,00.html
Article that looks at the safety issues and techniques that should be adhered to when winching a vehicle.
Basic Physics by Karl Kuhn (John Wiley and Sons, 1996)
A complicated subject made simple, this excellent resource takes all the basic concepts of an introductory physics course and brings them vividly to life.
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The Grip of Gravity: The quest to understand the laws of motion and gravitation by Prabhakar Gondhalekar (Cambridge University Press, 2001)
Describes the fundamental concepts, developments and experiments, both performed and planned, to increase our understanding of gravity and the natural laws of motion
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Medieval Warfare edited by Maurice Keen (Oxford University Press, 2001)
Explores over 700 years of European warfare, from the time of Charlemagne to the end of the Middle Ages.
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