Simple Machines

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Across
  1. 1. a short, slender, sharp-pointed metal pin with a raised helical thread running around it and a slotted head, used to join things together by being rotated so that it pierces wood or other material and is held tightly in place.
  2. 5. a rigid bar resting on a pivot, used to help move a heavy or firmly fixed load with one end when pressure is applied to the other.
  3. 7. piece of wood, metal, or some other material having one thick end and tapering to a thin edge, that is driven between two objects or parts of an object to secure or separate them.
  4. 10. sloping ramp up which heavy loads can be raised by ropes or chains.
Down
  1. 2. a simple lifting machine consisting of a rope which unwinds from a wheel on to a cylindrical drum or shaft joined to the wheel to provide mechanical advantage.
  2. 3. (of a person) move forward on the hands and knees or by dragging the body close to the ground.
  3. 4. the rate at which someone or something is able to move or operate.
  4. 6. a vigorous or determined attempt.
  5. 8. a wheel with a grooved rim around which a cord passes. It acts to change the direction of a force applied to the cord and is chiefly used (typically in combination) to raise heavy weights.
  6. 9. move slowly and carefully in order to avoid being heard or noticed.