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Across 7. A stationary motor-driven or hand-powered machine used for hoisting or hauling, 9. The lever used to release or activate a mechanism 11. the maximum height an object being hurled or thrown reaches 13. the quality or state of being strong 15. pronounced (tray-boo-shay) is a first class lever which uses the energy of a falling counterweight to make useful mechanical energy. (counterweight moves arm, which in turn, flings sling and projectile) 18. The distance from one side of a circle or sphere to the other passing through the center of the circle or sphere. 19. anything put in or on something for conveyance or transportation 21. Location in space. 22. Moving or directed toward a center or axis 23. the longest extent of anything as measured from end to end 25. Old-fashioned; unenlightened 30. The point or support at which a lever pivots. 33. is energy of motion; the output force of a device 34. main support framework that holds up the lever arm, sling, and projectile 35. Mechanics. something that produces or tends to produce torsion or rotation; the 36. A statement of relation between two quantities 38. The path of an object or moving body through space 39. long arm which rotates around the axle (fulcrum) and has the sling attached to one end and the counterweight attached to the other. 41. Moving or directed away from a center or axis 43. the distance a trebuchet can hurl or throw an object 44. name for a trebuchet or other weapon strictly designed to lay siege on a castle or fortification. Another example: battering ram 45. to throw or project something forward. 46. A bow-shaped curve or a segment of a circle 47. Extent from side to side wideness 48. the state or quality of being dense

Down 1. to rub togeather slow down/ generate heat 2. A fired, thrown, or otherwise propelled object, such as a bullet, having no capacity for self-propulsion 3. the ability to receive or contain 4. : A shape, formed by two lines or rays diverging from a common point (the vertex). 5. the exertion of force upon a surface by an object, fluid, etc 6. the capacity for vigorous activity 7. the amount or quantity of heaviness or mass; 8. Used to hold the sling during the throw movement of the trebuchet 10. The force that pulls all objects toward the center of Earth. 12. a weapon used to throw rocks and stones 14. distance upward from a given level to a fixed point 16. Holds the projectile during the throw movement, is designed to give extra power to the throw 17. The amount of matter in an object 20. A weight used as a counterbalance 22. Not a word 24. the resistance that still air offers to movement esp. of a vehicle 26. an ancient military engine for throwing stones or other missiles 27. A machine with few or no moving parts. Simple machines make work easier. 28. The measure of length between two points 29. is energy of position; stored energy; energy which becomes kinetic energy; the input force of a device. 31. transfers the energy from the counterweight into the sling 32. a straight line extending from the center of a circle or sphere to the circumference or surface 37. are the two main supports for the trebuchet’s axle (fulcrum), throwing arm, and counterweight. 40. To determine the amount of length, volume, or mass 42. The patterns or directions associated with a set of data.