Simple Machine

12345678
Across
  1. 1. formula for the mechanical advantage of an inclined plane is
  2. 4. is the fulcrum in the class 3 lever
  3. 6. simple machine
  4. 7. 1 gear system
Down
  1. 2. many class lever systems are there
  2. 3. of the simple machines
  3. 5. of class 3 lever
  4. 8. example where gears are used