1. aerodynamic

2. air resistance

3. able to move through the air with as little air resistance as possible.

4. the force of friction on a vehicle as it moves through the air.

5. axle

6. blueprint

7. a bar or shaft on which a wheel turns.

8. a detailed plan of drawing that shows how something is designed.

9. constant

10. cost-effective

11. a condition that is not changed in a scientific experiment.

12. able to produce the best results for the least money.

13. data

14. drag

15. information, such as that gathered during an experiment.

16. force that opposes the forward movement of a vehicle.

17. dynamics

18. energy

19. the part of physics that deals with how things move and the forces that change their motion.

20. the ability to do work or to make something happen.

21. force

22. friction

23. push or pull.

24. force that resists movement between two objects that are touching.

25. gravity

26. inclined plane

27. a natural force that draws things toward the earths surface.

28. a ramp or slanted surface.

29. inertia

30. kinetic energy

31. an objects ability to remain at rest or in motion until a force acts upon it.

32. energy associated with motion.

33. laws of motion

34. lever

35. three laws, formulated by Sir Isaac Newton, that describe how objects move in relation to the forces acting on them.

36. a bar or board resting on a support (fulcrum).

37. mass

38. momentum

39. the amount of matter an object has.

40. the speed or force that a moving object has because of its weight and motion.

41. potential energy

42. prototype

43. stored energy that can be released to become other forms of energy.

44. an original model or design.

45. pulley

46. screw

47. a grooved wheel with a rope around it.

48. an inclined plane wound around a cylinder.

49. simple machine

50. speed

51. a machine with few or no moving parts.

52. a measure of how fast something is moving.

53. technological design

54. tension

55. the process of designing and building products and systems to meet human needs.

56. the force exerted by a stretched object, such as a spring.

57. three-view drawing

58. variable

59. a diagram, showing top, side, and front views.

60. an element in an experiment than can be changed.

61. wedge

62. weight

63. two inclined planes put together to form a narrow cutting edge.

64. a measurement of the force of gravity on an object.

65. wheel and axle

66. a simple machine. It consists of asimple machine wheelwheel that turns an axle,axle or an axle that turns a wheel.