Levers and Gears

• what can gears do

  change speed, force or direction by rotation
• when the first gear is supplying the force, what happens if it's connected to a gear with fewer teeth

  the second gear will turn faster

  but with less force

  in opposite direction to first gear
• if its connected to a gear with more teeth (more levels)

  turns slower

  more force

  in opposite direction
• where will the second gear always turn

  in the opposite direction