Simple Machines

12345678
Across
  1. 2. The pivot point of a lever.
  2. 3. Two rigidly attached wheels that rotate together.
  3. 6. A surface that re-directs force using a rope.
  4. 8. Two inclined planes placed back-to-back.
Down
  1. 1. A sloped surface.
  2. 4. An inclined plane wrapped around a post.
  3. 5. Used with a pulley to change the direction of a force.
  4. 7. A rod that pivots about a point.