Making Machines Flashcards
1
Q
Ancient mill
A
Multiple force, a handle allows a heavy wheel to be turned within a channel
2
Q
Trebuchet , catapult and balista
A
Multiplies distance, created by the Chinese around the 4th century bc for weaponry
3
Q
Archimedes’ screw
A
Multiples force, made to help farmers lift water to a higher point at the Nile
4
Q
Archimedes’ defence tip boat
A
Multiples force invented as a sea defense
5
Q
Levers and moments
A
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
6
Q
Moments
A
Moment (Ncm or Nm) = force (n) x distance (m or cm ) distance is the distance from the pivot