Ancient mill
Multiple force, a handle allows a heavy wheel to be turned within a channel
Trebuchet , catapult and balista
Multiplies distance, created by the Chinese around the 4th century bc for weaponry
Archimedes’ screw
Multiples force, made to help farmers lift water to a higher point at the Nile
Archimedes’ defence tip boat
Multiples force invented as a sea defense
Levers and moments
Archimedes once said that with a large enough lever he could use only a small effort to lift a load as big as the earth
Moments
Moment (Ncm or Nm) = force (n) x distance (m or cm ) distance is the distance from the pivot