1. aerodynamic

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

3. air resistance

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

5. axle

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

7. blueprint

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

9. constant

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

11. cost-effective

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

13. data

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

15. drag

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

17. dynamics

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

19. energy

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

21. force

22. push or pull.

23. friction

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

25. gravity

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

27. inclined plane

28. a ramp or slanted surface.

29. inertia

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

31. kinetic energy

32. energy associated with motion.

33. laws of motion

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

35. lever

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

37. mass

38. the amount of matter an object has.

39. momentum

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

41. potential energy

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

43. prototype

44. an original model or design.

45. pulley

46. a grooved wheel with a rope around it.

47. screw

48. an inclined plane wound around a cylinder.

49. simple machine

50. a machine with few or no moving parts.

51. speed

52. a measure of how fast something is moving.

53. technological design

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

55. tension

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

57. three-view drawing

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

59. variable

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

61. wedge

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

63. weight

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.