Can anyone please tell me the science behind simple machines like Pulleys, Levers, Screws, Gears and Tamp?

Question

Any help would be greatly appreciated, this is part of my science project, information or a useful site please, thanks.

Answer 1

actually all of them workon a simple princeple -mutiplication of forces
when u use a pulley the little force u exert is used to move a heavy load by multiplying it the same applies for lever and gears
guess that the theory part and self explanatory
or try this for more specific info
howstuffworks.com

Answer 2

The ancient world had many needs, among which were ways to make hard work a little easier, (that still inspires new inventions). Studying the problem is the best way to be inspired to try new solutions. "Science" of invention differs from what we call science today. Ingenuity, inspiration, innovation, and basic engineering (with a little bit of genius) fills the need and finds solutions.That all could be called science.
Look up Archimedes, Aristotle, and Leonardo daVinci for more help.

Answer 3

Start with these:

http://edtech.kennesaw.edu/web/simmach.html


http://www.coe.uh.edu/archive/science/science_lessons/scienceles1/finalhome.htm