1. Chapter 2
Vocabulary Words

2. Acceleration

3. The rate at which velocity is changing in magnitude, direction or both

4. Average Speed

5. Path distance divided by time interval

6. Elapsed Time

7. Time that passed since the beginning of an event

8. Free Fall

9. Motion under the influence of the gravitational force

10. Instantaneous Speed

11. Speed at any instant of time

12. Rate

13. How much something changes per unit of time

14. Relative

15. Regarded in relation to something else

16. Speed

17. How fast something is moving, distance moved over time

18. Velocity

19. Speed together with the direction of motion

20. Chapter 3

21. Component

22. One of the vectors, often mutually perpendicular, whose sum is a resultant vector.

23. Projectile

24. An object that moves through the air or space acted on only by gravity.

25. Resolution

26. The process of determining the components of a vector.

27. Resultant

28. The vector sum of two or more component vectors.

29. Satellite

30. An object that falls around Earth or some other body rather than into it.

31. Scalar Quantity

32. A scaled amount only.

33. Vector

34. An arrow whose length represents the magnitude of a quantity and whose direction represents the direction of the quantity.

35. Vector Quantity

36. Includes a magnitude and direction.

37. Key Terms: Chapter 4

38. Equilibrium

39. In general, a state of balance

40. Force

41. Any push or pull

42. Friction

43. The force that resists relative motion of objects or materials that are in contact

44. Inertia

45. The reluctance of any body to change its state of motion

46. Kilogram

47. SI unit of motion

48. Law of Inertia

49. Every body continues in its state of rest or motion in a straight line at a constant speed unless compelled to chage that state by a net force exerted upon it

50. Mass

51. The amount of matter in an object

52. Net Force

53. The combination of all of the forces that act on an object

54. Newton

55. SI unit of force

56. Newton’s first law

57. The law of inertia

58. Normal Force

59. For an object resting on a horizontal surface the upward force that balances the weight of the object

60. Support force

61. Force that completely balances the weight of an object at rest

62. Weight

63. The force on a body due to the gravitational attraction of another body

64. Newton’s second law of motion- force and acceleration
Chapter 5

65. Air resistance
Friction, or drag, that acts on something moving through the air.

66. Fluid
Anything that flows, in particular, any liquid or gas.

67. Free-body diagram
A diagram showing all the forces acting on an object.

68. Inversely
When two values change in opposite directions, so that if one is doubled the other is reduced to one half, they are said to be inversely proportional to each other.

69. Newton’s second law
The acceleration produced by a net force on a body is directly proportional to the magnitude of the net force, is in the same direction as the net force, and is inversely proportional to the mass of the body.

70. Pascal
The SI unit of pressure. One Pascal of pressure exerts a normal force of one Newton per square meter.

71. Pressure
Force per surface area where the force is normal to the surface; measured in Pascals.

72. Terminal Velocity
Terminal speed together with the direction (down for falling objects).

73. Terminal speed
The speed at which the acceleration of a falling object is zero because friction balances the weight.

74. Key Terms
Chapter Six

75. One of the pair of forces described in Newton’s Third Law

76. Action Force

77. A mutual action between objects where each object exerts an equal but opposite force on the other

78. Interaction

79. Whenever one body exerts a force on another body the second body exerts an equal and opposite force on the first

80. Newton’s Third Law

81. The force that is equal in strength and opposite in direction to the action force, which acts simultaneously on whatever is exerting the action force

82. Reaction Force

83. Chapter 7 Vocabulary
Momentum

84. Electric charge that remains unchanged during interactions
Conserved

85. Colliding objects rebound without lasting deformation or heat generation
Elastic Collision

86. Product of force and time interval during which force acts
Impulse

87. Colliding objects become distorted and\or generate heat during the collision
Inelastic Collision

88. Law of Conservation of Momentum
Absence of a net external force, the momentum of an object or system of objects is unchanged
Law of Conservation of Momentum

89. Momentum (Linear Momentum)
Product of mass and the velocity of an object
-Has Magnitude and direction
Momentum (Linear Momentum)

90. Chapter 8 Vocabulary
Energy

91. Useful work output divided by the total work input
Efficiency

92. Enables an object to do something
Energy

93. Pivot point
Fulcrum

94. SI unit of work
Joule

95. Energy of motion equal to half the mass, multiplied by the speed squared
Kinetic energy

96. Law of Conservation of Energy
Energy can’t be created or destroyed
Law of Conservation of Energy

97. Machine made of bar that turns about a fixed point
Lever

98. Device used to multiple forces or simply to change direction of forces
Machine

99. Ratio of output force to the input
Mechanical advantage

100. Energy due to position or movement of something
Mechanical energy

101. Stored and held in readiness
Potential Energy

102. Rate at which work is done or energy is transformed, equal to the work done or energy transformed divided by time
-Measured in Watts
Power

103. Kind of lever used to change direction of a force
Pulley

104. SI unit of power
Watt

105. The product of a force of an object and the distance through which the object is moved
Work

106. States that whenever work is done, energy changes
Work-Energy Theorem

107. Shawna Foyle, Brittany Pyeritz, Mark Shandrick
Chapter 9
Shawna Foyle, Brittany Pyeritz, Mark Shandrick

108. AXiS

109. The straight line around which an object may rotate or revolve.
A horizontal or vertical reference line in a graph

110. CENTRiFUGAL FORCE

111. The outward force on a rotating or revolving body
- Fictitious (made up)

112. CENTRiPETAL FORCE

113. The center directed force that causes
an object to move in a curved path

114. Linear Speed

115. The path of distance moved per unit of time
- Aka speed

116. Revolution

117. Motion of an object turning around an axis outside the object

118. Rotation

119. The spinning motion that takes place
when an object rotates about an axis
- Located within the object

120. Rotational Speed

121. The number of rotations or revolutions per unit of time
- Measured in revolutions per minute
- RPM

122. Tangential Speed

123. The speed of an object moving around a circular path

124. CHAPTER 10

125. Center of Gravity

126. Point at the center of an objects weight distribution where the force of gravity can be considered to act

127. Center of Mass

128. Point at the center of an objects mass distribution where all its mass can be considered to be concentrated

129. Neutral Equilibrium

130. The state of an object balanced so any small movement neither raises nor lowers its center of gravity

131. Stable Equilibrium

132. The state of an object balanced so that any small displacement or rotation raises the center of gravity

133. Unstable Equilibrium

134. The state of an object balance so any small displacement or rotation lowers center of gravity

135. By Steve Schott Nick Pesanka & Jake Pulsifer
VOCAB for CHpt. !!-!2

136. Ch. 11
Angular momentum

137. The production of rotational inertia and rotational velocity.
Ch. 11
The production of rotational inertia and rotational velocity.

138. LAW OF CONSERVATION OF ANGULAR MOMENTUM
Ch. 11
LAW OF CONSERVATION OF ANGULAR MOMENTUM

139. Ch. 11
If no unbalanced external torque acts on a rotating system the angular momentum of that system is constant.

140. Ch. 11
LEVER ARM

141. Ch. 11
The perpendicular distance between an axis and the line of action of a force that tends to produce rotation about the axis.

142. Ch. 11
Linear momentum

143. Product of the mass and the velocity of an object, a.k.a. momentum
Ch. 11
Product of the mass and the velocity of an object, a.k.a. momentum

144. Ch. 11
Rotational inertia

145. Ch.11
The reluctance of an object to change its state of rotation, determined by the distribution of the mass of the object in the location of the axis of rotation or revolution.

146. Ch. 11
Rotational Velocity

147. Ch. 11
Rotational speed together with a direction for the axis of rotation or revolution.

148. Ch. 11
The rotational analog of force is _______. Hint: Tends to produce rotational acceleration.

149. Ch. 11
Torque
DUH.