SIMPLEMACHINE A basic mechanical device that changes the magnitude of a force. LEVER A rigid bar that pivots on a fixed point. PULLEY A grooved wheel with a rope used to lift heavy loads. WEDGE A portable inclined plane used to split or secure objects. SC

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Across
  1. 3. A system of parts working together in a machine.
  2. 5. The spiral ridges wrapped around a screw.
  3. 6. A grooved wheel with a rope used to lift heavy loads.
  4. 7. The sharp cutting edge of a tool acting as a wedge.
  5. 8. The initial force or work put into a mechanical system.
  6. 12. The amount of matter in an object.
  7. 14. A cylinder that rotates to move or flatten things easily.
  8. 18. The overall rate at which work is being done.
  9. 19. The rate at which an object changes its velocity.
  10. 25. The exact pivot point around which a lever turns.
  11. 26. A basic mechanical device that changes the magnitude of a force.
  12. 28. A twisting force that tends to cause rotation.
  13. 29. A farm tool used to cut through soil using a large wedge.
  14. 30. The resistance encountered when one surface rubs against another.
  15. 33. Relating to or resulting from physical motion.
  16. 36. A playground structure that acts as an inclined plane.
  17. 38. A toothed wheel that engages with another to change speed.
  18. 39. The ratio of output force to input force in a machine.
  19. 41. Stored energy waiting to be released.
  20. 42. The percentage of input work that becomes useful output work.
  21. 46. The rate at which someone or something is able to move.
  22. 47. A complex machine made of two or more simple machines.
  23. 48. A deep hole for water that traditionally uses a pulley system.
Down
  1. 1. The weight or object being moved by a machine.
  2. 2. A force that opposes or slows down motion.
  3. 4. A circular component that rotates on a central axle.
  4. 7. A threaded metal fastener that functions as a screw.
  5. 9. A tapered metal pin driven into wood acting as a wedge.
  6. 10. An inclined plane wrapped around a central cylinder.
  7. 11. A foot-operated lever used to power a mechanism.
  8. 13. A central shaft on which a wheel or gear rotates.
  9. 15. Energy transferred when a force moves an object.
  10. 16. A series of steps acting as a modified inclined plane.
  11. 17. A common kitchen tool that uses a wedge to cut.
  12. 20. A rigid bar that pivots on a fixed point.
  13. 21. A device used to lift vehicles using a screw or lever.
  14. 22. A mechanical device used for lifting heavy loads with pulleys.
  15. 23. The final useful work or force delivered by a machine.
  16. 24. A cylindrical device on which thread or rope is wound.
  17. 27. A tool with a sharp wedge edge used for cutting stone or wood.
  18. 31. A jointed device on which a door or gate turns.
  19. 32. A portable inclined plane used to split or secure objects.
  20. 34. The ability to do work or cause physical change.
  21. 35. A handle that can be turned to rotate an axle.
  22. 37. A slope or slanted surface.
  23. 38. The natural force pulling objects down toward the earth.
  24. 40. A round handle that functions as a wheel and axle mechanism.
  25. 43. Any push or pull exerted on an object.
  26. 44. The force applied to a machine to get it to do work.
  27. 45. A machine consisting of multiple interconnected moving parts.