History of Simple machine

	Revision 4 . . November 29, 2001 5:18 am by (logged).123.179.xxx [*The other article had some good info, don't erase information!]
	Revision 3 . . (edit) September 6, 2001 7:56 pm by WojPob

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Changed: 1c1

A simple machine is...

A simple machine is any device that only requires the application of a single force to work.

Changed: 12c12

All of these convert low forces into high forces or vice versa. The archimedes screw?, which is a pump, is an example of a complex machine where the screw is a helical inclined plane.

All of these convert low forces into high forces or vice versa, and the ratio of the input force to the output force is the Mechanical advantage. The archimedes screw?, which is a pump, is an example of a complex machine where the screw is a helical inclined plane.