Simple Machines

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Simple Machines

  1. 1. Motion and Machines Unit Part III/III
  2. 2. <ul><li>New Area of focus: Simple Machines. </li></ul>Copyright © 2010 Ryan P. Murphy
  3. 3. <ul><li>Mechanical advantage (MA): The number of times a machine multiplies your effort force. </li></ul>Copyright © 2010 Ryan P. Murphy
  4. 4. <ul><li>To find MA </li></ul><ul><ul><li>Divide resistance force (usually weight in g) by the effort force (Newtons) </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  5. 5. <ul><li>To find MA </li></ul><ul><ul><li>Divide resistance force (usually weight in g) by the effort force (Newton) </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  6. 6. <ul><li>Simple machines: Types of machines that do work with one movement. </li></ul>Copyright © 2010 Ryan P. Murphy
  7. 7. <ul><li>Simple machines: Types of machines that do work with one movement. </li></ul>Copyright © 2010 Ryan P. Murphy
  8. 8. <ul><li>Simple machines: Types of machines that do work with one movement. </li></ul>Copyright © 2010 Ryan P. Murphy
  9. 9. <ul><li>Simple machines: Types of machines that do work with one movement. </li></ul>Copyright © 2010 Ryan P. Murphy
  10. 10. <ul><li>Simple machines: Types of machines that do work with one movement. </li></ul>Copyright © 2010 Ryan P. Murphy
  11. 11. <ul><li>Simple machines: Types of machines that do work with one movement. </li></ul>Copyright © 2010 Ryan P. Murphy
  12. 12. <ul><li>Simple machines: Types of machines that do work with one movement. </li></ul>Copyright © 2010 Ryan P. Murphy
  13. 13. <ul><li>Simple machines: Types of machines that do work with one movement. </li></ul>Copyright © 2010 Ryan P. Murphy
  14. 14. <ul><li>  Pulley </li></ul><ul><ul><li>Uses grooved wheels and a rope to raise, lower or move a load. </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  15. 15. <ul><li>  Pulley </li></ul><ul><ul><li>Uses grooved wheels and a rope to raise, lower or move a load. </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  16. 16. <ul><li>A pulley makes work seem easier </li></ul><ul><ul><li>Changes the direction of motion to work with gravity. Instead of lifting up, you can pull down. </li></ul></ul><ul><ul><li>Uses your body weight against the resistance. </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  17. 17. <ul><li>A pulley makes work seem easier </li></ul><ul><ul><li>Changes the direction of motion to work with gravity. Instead of lifting up, you can pull down. </li></ul></ul><ul><ul><li>Uses your body weight against the resistance. </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  18. 18. <ul><li>A pulley makes work seem easier </li></ul><ul><ul><li>Changes the direction of motion to work with gravity. Instead of lifting up, you can pull down. </li></ul></ul><ul><ul><li>Uses your body weight against the resistance. </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  19. 19. <ul><li>The more pulleys that are used, the more the MA (Mechanical Advantage). </li></ul>Copyright © 2010 Ryan P. Murphy
  20. 20. <ul><li>The more pulleys that are used, the more the MA (Mechanical Advantage). </li></ul>Copyright © 2010 Ryan P. Murphy
  21. 21. <ul><li>MA = The number of ropes that support the pulley. The end of the rope doesn’t count. </li></ul><ul><ul><li>What is the MA of this pulley system below? </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  22. 22. <ul><li>MA = The number of ropes that support the pulley. The end of the rope doesn’t count. </li></ul><ul><ul><li>What is the MA of this pulley system below? </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  23. 23. <ul><li>Answer: The MA is 2. </li></ul>Copyright © 2010 Ryan P. Murphy
  24. 24. <ul><li>What is the MA of this pulley system? </li></ul>Copyright © 2010 Ryan P. Murphy
  25. 25. <ul><li>Answer, the MA is 4. </li></ul>Copyright © 2010 Ryan P. Murphy
  26. 26. <ul><li>Three types of pulleys </li></ul><ul><ul><li>- </li></ul></ul><ul><ul><li>- </li></ul></ul><ul><ul><li>- </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  27. 27. <ul><li>Fixed pulley </li></ul><ul><ul><li>No MA </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  28. 28. <ul><li>Fixed pulley </li></ul><ul><ul><li>No MA </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  29. 29. <ul><li>Movable Pulley </li></ul>Copyright © 2010 Ryan P. Murphy
  30. 30. <ul><li>Combined Pulley / Block and tackle </li></ul>Copyright © 2010 Ryan P. Murphy
  31. 31. <ul><li>Rock climbing uses pulleys. </li></ul>Copyright © 2010 Ryan P. Murphy
  32. 32. <ul><li>Sailing uses pulleys to ease difficult jobs. </li></ul>Copyright © 2010 Ryan P. Murphy
  33. 34. Pulleys
  34. 37. <ul><li>The chain on your bicycle is a pulley. </li></ul>
  35. 38. <ul><li>The chain on your bicycle is a pulley. </li></ul>
  36. 40. <ul><li>Quiz Wiz 1-10 Fixed Pulley, Moveable Pulley, Block and Tackle/Combined Pulley </li></ul>Copyright © 2010 Ryan P. Murphy
  37. 41. <ul><li>1 </li></ul>
  38. 42. <ul><li>1 What’s the Mechanical Advantage? </li></ul>
  39. 43. <ul><li>2 </li></ul>
  40. 44. <ul><li>2 What is the Mechanical Advantage? </li></ul>
  41. 45. <ul><li>3 </li></ul>
  42. 46. <ul><li>3 </li></ul>Can you determine The Mechanical Advantage?
  43. 47. <ul><li>4 </li></ul>
  44. 48. <ul><li>5 </li></ul>
  45. 49. <ul><li>5 What is the MA? </li></ul>
  46. 50. <ul><li>6 </li></ul>
  47. 51. <ul><li>7 </li></ul>
  48. 52. <ul><li>8 </li></ul>
  49. 53. <ul><li>9 </li></ul>
  50. 54. <ul><li>9 What is the MA? </li></ul>
  51. 55. <ul><li>10 </li></ul>
  52. 56. <ul><li>Answers! Quiz Wiz 1-10 Fixed Pulley, Moveable Pulley, Block and Tackle/Combined Pulley </li></ul>Copyright © 2010 Ryan P. Murphy
  53. 57. <ul><li>1 </li></ul>
  54. 58. <ul><li>1 Combined Pulley / Block and Tackle </li></ul>
  55. 59. <ul><li>1 Combined Pulley / Block and Tackle </li></ul><ul><li>Mechanical Advantage 2 </li></ul>
  56. 60. <ul><li>2 </li></ul>
  57. 61. <ul><li>2 Fixed Pulley </li></ul>
  58. 62. <ul><li>2 Fixed Pulley </li></ul><ul><li>0/No Mechanical Advantage </li></ul>
  59. 63. <ul><li>3 </li></ul>
  60. 64. <ul><li>3 Block and Tackle </li></ul>
  61. 65. <ul><li>3 Block and Tackle </li></ul><ul><li>MA= 4 </li></ul>
  62. 66. <ul><li>4 </li></ul>
  63. 67. <ul><li>4 Moveable Pulley </li></ul>
  64. 68. <ul><li>5 </li></ul>
  65. 69. <ul><li>5 Combined Pulley / Block and Tackle </li></ul>
  66. 70. <ul><li>5 Combined Pulley / Block and Tackle </li></ul><ul><li>MA=2 </li></ul>
  67. 71. <ul><li>6 </li></ul>
  68. 72. <ul><li>6 Moveable Pulley </li></ul>
  69. 73. <ul><li>7 </li></ul>
  70. 74. <ul><li>7 Moveable Pulley </li></ul>
  71. 75. <ul><li>8 </li></ul>
  72. 76. <ul><li>8 Moveable Pulley </li></ul>
  73. 77. <ul><li>9 </li></ul>
  74. 78. <ul><li>9 Combined Pulley / Block and Tackle </li></ul>
  75. 79. <ul><li>9 Combined Pulley / Block and Tackle MA= 3 </li></ul>
  76. 80. <ul><li>10 </li></ul>
  77. 81. <ul><li>10 Fixed Pulley </li></ul>
  78. 82.   <ul><li>Lever </li></ul><ul><ul><li>A stiff bar that rests on a support called a fulcrum which lifts or moves loads. </li></ul></ul>
  79. 83.   <ul><li>Lever </li></ul><ul><ul><li>A stiff bar that rests on a support called a fulcrum which lifts or moves loads. </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  80. 85. <ul><li>MA = length of effort arm ÷ length of resistance arm. </li></ul>Copyright © 2010 Ryan P. Murphy
  81. 86. <ul><li>MA = length of effort arm ÷ length of resistance arm. </li></ul>Copyright © 2010 Ryan P. Murphy
  82. 87. <ul><li>MA = length of effort arm ÷ length of resistance arm. </li></ul>Copyright © 2010 Ryan P. Murphy
  83. 88. <ul><li>MA = length of effort arm ÷ length of resistance arm. </li></ul>Copyright © 2010 Ryan P. Murphy
  84. 89. <ul><li>MA = length of effort arm ÷ length of resistance arm. </li></ul>Copyright © 2010 Ryan P. Murphy
  85. 90. <ul><li>MA = length of effort arm ÷ length of resistance arm. </li></ul>Copyright © 2010 Ryan P. Murphy
  86. 91. <ul><li>The 3 types of levers </li></ul><ul><ul><li>- </li></ul></ul><ul><ul><li>- </li></ul></ul><ul><ul><li>- </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  87. 92. <ul><li>The 3 types of levers </li></ul><ul><ul><li>- </li></ul></ul><ul><ul><li>- </li></ul></ul><ul><ul><li>- </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  88. 93. <ul><li>The 3 types of levers </li></ul><ul><ul><li>- </li></ul></ul><ul><ul><li>- </li></ul></ul><ul><ul><li>- </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  89. 94. <ul><li>The 3 types of levers </li></ul><ul><ul><li>- </li></ul></ul><ul><ul><li>- </li></ul></ul><ul><ul><li>- </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  90. 95. <ul><li>The 3 types of levers </li></ul><ul><ul><li>- </li></ul></ul><ul><ul><li>- </li></ul></ul><ul><ul><li>- </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  91. 96. <ul><li>First Class Lever </li></ul>Copyright © 2010 Ryan P. Murphy
  92. 102. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Create a first class lever and send and toy into the air by jumping on the effort arm. </li></ul></ul>
  93. 103. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Create a first class lever and send and toy into the air by jumping on the effort arm. </li></ul></ul>
  94. 104. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Create a first class lever and send and toy into the air by jumping on the effort arm. </li></ul></ul>
  95. 105. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Create a first class lever and send and toy into the air by jumping on the effort arm. </li></ul></ul>
  96. 106. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Create a first class lever and send and toy into the air by jumping on the effort arm. </li></ul></ul>
  97. 107. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Change the fulcrum, Will this change how high the toy will travel. </li></ul></ul>
  98. 108. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Change the fulcrum, Will this change how high the toy will travel. </li></ul></ul>
  99. 109. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Change the fulcrum, Will this change how high the toy will travel. </li></ul></ul>
  100. 110. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Change the fulcrum, Will this change how high the toy will travel. </li></ul></ul>
  101. 111. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Change the fulcrum, Will this change how high the toy will travel. </li></ul></ul>
  102. 112. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Change the fulcrum, Will this change how high the toy will travel. </li></ul></ul>
  103. 113. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Change the fulcrum, Will this change how high the toy will travel. </li></ul></ul>
  104. 114. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Change the fulcrum, Will this change how high the toy will travel. </li></ul></ul>
  105. 115. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Change the fulcrum, Will this change how high the toy will travel. </li></ul></ul>
  106. 116. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Change the fulcrum, Will this change how high the toy will travel. </li></ul></ul>
  107. 117. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Change the fulcrum, Will this change how high the toy will travel. </li></ul></ul>
  108. 118. <ul><li>Activity! Sending a stuffed toy flying. </li></ul><ul><ul><li>Change the fulcrum, Will this change how high the toy will travel. </li></ul></ul>
  109. 119. <ul><li>Second Class Lever </li></ul>Copyright © 2010 Ryan P. Murphy
  110. 120. <ul><li>Activity! Charades, what is the common item acted out. </li></ul><ul><ul><li>Hint, It’s a second class lever. </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  111. 121. <ul><li>Answer, A wheel barrel. </li></ul>Copyright © 2010 Ryan P. Murphy
  112. 123. <ul><li>Please use your materials from the first class lever to construct a second class lever. </li></ul><ul><ul><li>Feel the difference when you adjust the load. </li></ul></ul>
  113. 124. <ul><li>Please use your materials from the first class lever to construct a second class lever. </li></ul><ul><ul><li>Feel the difference when you adjust the load. </li></ul></ul>
  114. 125. <ul><li>Please use your materials from the first class lever to construct a second class lever. </li></ul><ul><ul><li>Feel the difference when you adjust the load. </li></ul></ul>
  115. 126. <ul><li>Please use your materials from the first class lever to construct a second class lever. </li></ul><ul><ul><li>Feel the difference when you adjust the load. </li></ul></ul>
  116. 127. <ul><li>Please use your materials from the first class lever to construct a second class lever. </li></ul><ul><ul><li>Feel the difference when you adjust the load. </li></ul></ul>
  117. 128. <ul><li>Please use your materials from the first class lever to construct a second class lever. </li></ul><ul><ul><li>Feel the difference when you adjust the load. </li></ul></ul>
  118. 129. <ul><li>Please use your materials from the first class lever to construct a second class lever. </li></ul><ul><ul><li>Feel the difference when you adjust the load. </li></ul></ul>
  119. 130. <ul><li>Please use your materials from the first class lever to construct a second class lever. </li></ul><ul><ul><li>Feel the difference when you adjust the load. </li></ul></ul>
  120. 131. <ul><li>Please use your materials from the first class lever to construct a second class lever. </li></ul><ul><ul><li>Feel the difference when you adjust the load. </li></ul></ul>
  121. 132. <ul><li>Third Class Lever. </li></ul><ul><ul><li>Has Mechanical Disadvantage. </li></ul></ul><ul><ul><li>Requires more force to lift the load. </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  122. 133. <ul><li>Third Class Lever. </li></ul><ul><ul><li>Has Mechanical Disadvantage. </li></ul></ul><ul><ul><li>Requires more force to lift the load. </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  123. 134. <ul><li>Third Class Lever. </li></ul><ul><ul><li>Has Mechanical Disadvantage. </li></ul></ul><ul><ul><li>Requires more force to lift the load. </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  124. 136. Fulcrum
  125. 137. Load Fulcrum
  126. 138. Load Fulcrum Effort
  127. 140. <ul><li>How many levers can you point out? </li></ul>
  128. 141. <ul><li>How many levers can you point out? </li></ul>
  129. 142. <ul><li>Wedge: An object with at least one slanting side ending in a sharp edge, which cuts materials apart. </li></ul>Copyright © 2010 Ryan P. Murphy
  130. 143. <ul><li>The mechanical advantage of a wedge can be found by dividing the length of the slope (S) by the thickness (T) of the big end. </li></ul><ul><ul><li>What is the MA of the wedge below. </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  131. 144. <ul><li>The mechanical advantage of a wedge can be found by dividing the length of the slope (S) by the thickness (T) of the big end. </li></ul><ul><ul><li>What is the MA of the wedge below. </li></ul></ul>50 cm 10 cm Copyright © 2010 Ryan P. Murphy
  132. 145. <ul><li>Answer! 10/50 = Mechanical Advantage 5 </li></ul>50 cm 10 cm Copyright © 2010 Ryan P. Murphy
  133. 146. <ul><li>Which wedge below has the greater MA Mechanical Advantage? </li></ul>Copyright © 2010 Ryan P. Murphy
  134. 147. <ul><li>Answer! A because the wedge is not thick. </li></ul>Copyright © 2010 Ryan P. Murphy
  135. 150. <ul><li>Wheel and Axle: A wheel with a rod, called an axle, through its center lifts or moves a load. </li></ul>Copyright © 2010 Ryan P. Murphy
  136. 151. <ul><li>Wheel and Axle: A wheel with a rod, called an axle, through its center lifts or moves a load. </li></ul>Copyright © 2010 Ryan P. Murphy The larger circles are the wheels.
  137. 152. <ul><li>Wheel and Axle: A wheel with a rod, called an axle, through its center lifts or moves a load. </li></ul>Copyright © 2010 Ryan P. Murphy The larger circles are the wheels. The smaller circles are the axles.
  138. 162. Axle Wheel
  139. 164. <ul><li>The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel divided by the radius of the axle. </li></ul>Copyright © 2010 Ryan P. Murphy
  140. 165. <ul><li>The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel divided by the radius of the axle. </li></ul>Copyright © 2010 Ryan P. Murphy
  141. 166. <ul><li>The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel divided by the radius of the axle. </li></ul>Copyright © 2010 Ryan P. Murphy
  142. 167. <ul><li>The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel divided by the radius of the axle. </li></ul>Copyright © 2010 Ryan P. Murphy
  143. 168. <ul><li>The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel divided by the radius of the axle . </li></ul>Copyright © 2010 Ryan P. Murphy
  144. 169. <ul><li>The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel divided by the radius of the axle . </li></ul>Copyright © 2010 Ryan P. Murphy
  145. 170. <ul><li>Radius: A straight line from a circles center to it’s perimeter. </li></ul>
  146. 171. <ul><li>Diameter: The length of a straight line passing through the center of a circle and connecting two points on the circumference. </li></ul>
  147. 172. <ul><li>Diameter: The length of a straight line passing through the center of a circle and connecting two points on the circumference. </li></ul>Diameter
  148. 173. <ul><li>What is the MA of this wheel below? </li></ul>r=60 cm r=3 cm Copyright © 2010 Ryan P. Murphy
  149. 174. <ul><li>MA = 20 </li></ul>r=60 cm r=3 cm Copyright © 2010 Ryan P. Murphy
  150. 175. <ul><li>An Inclined plane: A slanting surface connecting a lower level to a higher level. </li></ul>Copyright © 2010 Ryan P. Murphy
  151. 176. <ul><li>Where are the inclined planes? </li></ul>Copyright © 2010 Ryan P. Murphy
  152. 177. <ul><li>Answer! </li></ul>Copyright © 2010 Ryan P. Murphy
  153. 178. <ul><li>MA for an inclined plane is the length of the slope divided by the height (Rise). </li></ul><ul><ul><li>What is the MA of this inclined plane? </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  154. 179. <ul><li>MA for an inclined plane is the length of the slope divided by the height (Rise). </li></ul><ul><ul><li>What is the MA of this inclined plane? </li></ul></ul>100 m 25 m Copyright © 2010 Ryan P. Murphy
  155. 180. <ul><li>MA for an inclined plane is the length of the slope divided by the height (Rise). </li></ul><ul><ul><li>What is the MA of this inclined plane? MA=4 </li></ul></ul>100 m 25 m Copyright © 2010 Ryan P. Murphy
  156. 181. <ul><li>Inclined plane is a wedge </li></ul>
  157. 185. <ul><li>Screw : An inclined plane wrapped around a pole which holds things together or lifts materials. </li></ul>Copyright © 2010 Ryan P. Murphy
  158. 186. <ul><li>Screw : An inclined plane wrapped around a pole which holds things together or lifts materials. </li></ul>Copyright © 2010 Ryan P. Murphy
  159. 187. <ul><li>Screw : An inclined plane wrapped around a pole which holds things together or lifts materials. </li></ul>Copyright © 2010 Ryan P. Murphy
  160. 188. <ul><li>The mechanical advantage of a screw can be found by dividing the circumference of the screw by the pitch of the screw. </li></ul>Copyright © 2010 Ryan P. Murphy
  161. 189. <ul><li>The gentler the pitch (i.e. finer the thread), the easier it moves, but you have to make a lot of turns. </li></ul><ul><ul><li>Which of the samples below has the highest MA? </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  162. 190. <ul><li>The gentler the pitch (i.e. finer the thread), the easier it moves, but you have to make a lot of turns. </li></ul><ul><ul><li>Which of the samples below has the highest MA? </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  163. 191. <ul><li>The gentler the pitch (i.e. finer the thread), the easier it moves, but you have to make a lot of turns. </li></ul><ul><ul><li>Which of the samples below has the highest MA? </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  164. 192. <ul><li>The circumference of a circle is the distance around the circle. It is the circle's perimeter. The formula for circumference is: </li></ul><ul><ul><li>Circumference = times Diameter </li></ul></ul><ul><ul><li>C = π d </li></ul></ul><ul><ul><li>Where π = 3.14 </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  165. 193. <ul><li>The circumference of a circle is the distance around the circle. It is the circle's perimeter. The formula for circumference is: </li></ul><ul><ul><li>Circumference = times Diameter </li></ul></ul><ul><ul><li>C = π d </li></ul></ul><ul><ul><li>Where π = 3.14 </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  166. 194. <ul><li>The circumference of a circle is the distance around the circle. It is the circle's perimeter. The formula for circumference is: </li></ul><ul><ul><li>Circumference = times Diameter </li></ul></ul><ul><ul><li>C = π d </li></ul></ul><ul><ul><li>Where π = 3.14 </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  167. 195. <ul><li>The circumference of a circle is the distance around the circle. It is the circle's perimeter. The formula for circumference is: </li></ul><ul><ul><li>Circumference = times Diameter </li></ul></ul><ul><ul><li>C = π d </li></ul></ul><ul><ul><li>Where π = 3.14 </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  168. 196. <ul><li>The circumference of a circle is the distance around the circle. It is the circle's perimeter. The formula for circumference is: </li></ul><ul><ul><li>Circumference = times Diameter </li></ul></ul><ul><ul><li>C = π d </li></ul></ul><ul><ul><li>Where π = 3.14 </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  169. 197. <ul><li>The circumference of a circle is the distance around the circle. It is the circle's perimeter. The formula for circumference is: </li></ul><ul><ul><li>Circumference = times Diameter </li></ul></ul><ul><ul><li>C = π d </li></ul></ul><ul><ul><li>Where π = 3.14 </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  170. 198. <ul><li>The circumference of a circle is the distance around the circle. It is the circle's perimeter. The formula for circumference is: </li></ul><ul><ul><li>Circumference = times Diameter </li></ul></ul><ul><ul><li>C = π d </li></ul></ul><ul><ul><li>Where π = 3.14 </li></ul></ul>Copyright © 2010 Ryan P. Murphy
  171. 199. <ul><li>What is the MA of the screw below? </li></ul><ul><li>Divide circumference by the pitch to get MA. </li></ul>.5 cm 2 cm Copyright © 2010 Ryan P. Murphy
  172. 200. <ul><li>2 = 6.28 </li></ul>.5 cm 2 cm Copyright © 2010 Ryan P. Murphy
  173. 201. <ul><li>2 = 6.28 </li></ul><ul><li>6.28 / .5 </li></ul>.5 cm 2 cm Copyright © 2010 Ryan P. Murphy
  174. 202. <ul><li>2 = 6.28 </li></ul><ul><li>6.28 / .5 Mechanical Advantage = 12.56 </li></ul>.5 cm 2 cm Copyright © 2010 Ryan P. Murphy
  175. 203. <ul><li>Archimedes Screw: A screw contained in a cylinder that when turned can easily raise water. </li></ul>
  176. 206. <ul><li>Name the Simple Machine </li></ul>Wheel and axle
  177. 207. <ul><li>Quiz Wiz! 1-10 Name the Simple Machine </li></ul>Wheel and axle
  178. 208. <ul><li>Quiz Wiz! 1-10 Name the Simple Machine </li></ul>Wheel and axle
  179. 209. <ul><li>Quiz Wiz! 1-10 Name the Simple Machine </li></ul>Wheel and axle
  180. 210. <ul><li>Quiz Wiz! 1-10 Name the Simple Machine </li></ul>Wheel and axle
  181. 211. <ul><li>Quiz Wiz! 1-10 Name the Simple Machine </li></ul>Wheel and axle
  182. 212. <ul><li>Quiz Wiz! 1-10 Name the Simple Machine </li></ul>Wheel and axle
  183. 213. <ul><li>Quiz Wiz! 1-10 Name the Simple Machine </li></ul>Wheel and axle
  184. 214. <ul><li>Review – Name a few machines seen in this animation. </li></ul>
  185. 215. <ul><li>Answer! Name a few machines seen in this animation. </li></ul>Wheel and Axle
  186. 216. <ul><li>Answer! Name a few machines seen in this animation. </li></ul>Lever
  187. 217. <ul><li>Answer! Name a few machines seen in this animation. </li></ul>Lever
  188. 218. <ul><li>Answer! Name a few machines seen in this animation. </li></ul>Wedge
  189. 219. <ul><li>Answer! Name a few machines seen in this animation. </li></ul>Screw
  190. 220. <ul><li>Quiz Wiz 1-10 Name the simple machine. </li></ul>
  191. 221. <ul><li>Answers to the Quiz </li></ul>
  192. 222. <ul><li>1 </li></ul>
  193. 223. <ul><li>1 Inclined Plane </li></ul>
  194. 224. 2
  195. 225. 2 Pulley
  196. 226. <ul><li>3 </li></ul>
  197. 227. <ul><li>3 Lever </li></ul>
  198. 228. <ul><li>4 </li></ul>
  199. 229. <ul><li>4 Wheel and Axle </li></ul>
  200. 230. <ul><li>5 </li></ul>
  201. 231. <ul><li>5 Wedge </li></ul>
  202. 232. <ul><li>6 </li></ul>
  203. 233. <ul><li>6 Wheel and Axle </li></ul>
  204. 234. <ul><li>7 </li></ul>
  205. 235. <ul><li>7 Screw </li></ul>
  206. 236. <ul><li>8 </li></ul>
  207. 237. <ul><li>8 Lever </li></ul>
  208. 238. <ul><li>9 </li></ul>
  209. 239. <ul><li>9 Screw </li></ul>
  210. 240. <ul><li>10 </li></ul>
  211. 241. <ul><li>10 Pulley </li></ul>
  212. 242. <ul><li>Bonus – What simple machine do I represent. </li></ul>
  213. 243. <ul><li>Compound machines: Two or more simple machines working together. </li></ul>Copyright © 2010 Ryan P. Murphy
  214. 244. <ul><li>Compound machines: Two or more simple machines working together. </li></ul>Copyright © 2010 Ryan P. Murphy Lever
  215. 245. <ul><li>Compound machines: Two or more simple machines working together. </li></ul>Copyright © 2010 Ryan P. Murphy Lever Wedge
  216. 247. <ul><li>What two simple machines make this pizza cutter and compound machine? </li></ul>
  217. 248. <ul><li>Wheel and axle and the wedge. </li></ul>
  218. 249. <ul><li>What two simple machines make up this very simple can opener? </li></ul>Copyright © 2010 Ryan P. Murphy
  219. 250. <ul><li>Answer: Wedge and Lever </li></ul>Copyright © 2010 Ryan P. Murphy
  220. 251. <ul><li>What simple machines make this can opener a compound machine? </li></ul>
  221. 252. <ul><li>Wheel and Axle, Lever, Wedge, </li></ul>
  222. 253. <ul><li>A B </li></ul><ul><li>All energy is… </li></ul><ul><li>A.) Kinetic or Potential. </li></ul><ul><li>B.) At a state of rest. </li></ul><ul><li>C.) Subjected to gravity. </li></ul><ul><li>D.) Work = Force x Distance </li></ul><ul><li>C D </li></ul>
  223. 254. <ul><li>A B </li></ul><ul><li>All energy is… </li></ul><ul><li>A.) Kinetic or Potential. </li></ul><ul><li>B.) At a state of rest. </li></ul><ul><li>C.) Subjected to gravity. </li></ul><ul><li>D.) Work = Force x Distance </li></ul><ul><li>C D </li></ul>
  224. 255. <ul><li>A B </li></ul><ul><li>Kinetic Energy is the energy and object has because of it’s… </li></ul><ul><li>A.) Mass and Motion. </li></ul><ul><li>B.) Time and Space. </li></ul><ul><li>C.) Friction Level </li></ul><ul><li>D.) Affects on gravity. </li></ul><ul><li>C D </li></ul>
  225. 256. <ul><li>A B </li></ul><ul><li>Kinetic Energy is the energy and object has because of it’s… </li></ul><ul><li>A.) Mass and Motion. </li></ul><ul><li>B.) Time and Space. </li></ul><ul><li>C.) Friction Level </li></ul><ul><li>D.) Affects on gravity. </li></ul><ul><li>C D </li></ul>
  226. 257. <ul><li>A B </li></ul><ul><li>This is a stiff bar that rests on a support called a fulcrum which lifts or moves loads. </li></ul><ul><li>A.) Wedge </li></ul><ul><li>B.) Inclined plane </li></ul><ul><li>C.) Lever </li></ul><ul><li>D.) Screw </li></ul><ul><li>C D </li></ul>
  227. 258. <ul><li>A B </li></ul><ul><li>This is the straight line from a circles center to it’s perimeter. </li></ul><ul><li>A.) Diameter </li></ul><ul><li>B.) Distance </li></ul><ul><li>C.) Radius </li></ul><ul><li>D.) Mechanical Advantage </li></ul><ul><li>C D </li></ul>
  228. 259. <ul><li>A B </li></ul><ul><li>This is the straight line from a circles center to it’s perimeter. </li></ul><ul><li>A.) Diameter </li></ul><ul><li>B.) Distance </li></ul><ul><li>C.) Radius </li></ul><ul><li>D.) Mechanical Advantage </li></ul><ul><li>C D </li></ul>
  229. 260. <ul><li>A B </li></ul><ul><li>This is the name for an object with at least one slanting side ending in a sharp edge, which cuts material apart. </li></ul><ul><li>A.) Pulley </li></ul><ul><li>B.) Wedge </li></ul><ul><li>C.) Second Class Lever </li></ul><ul><li>D.) Third Class Lever </li></ul><ul><li>C D </li></ul>
  230. 261. <ul><li>A B </li></ul><ul><li>This is the name for an object with at least one slanting side ending in a sharp edge, which cuts material apart. </li></ul><ul><li>A.) Pulley </li></ul><ul><li>B.) Wedge </li></ul><ul><li>C.) Second Class Lever </li></ul><ul><li>D.) Third Class Lever </li></ul><ul><li>C D </li></ul>
  231. 262. <ul><li>A B </li></ul><ul><li>This is the name for a slanting surface connecting a lower level to a higher level. </li></ul><ul><li>A.) Block and Tackle </li></ul><ul><li>B.) Wedge </li></ul><ul><li>C.) Inclined Plane </li></ul><ul><li>D.) First Class Lever </li></ul><ul><li>C D </li></ul>
  232. 263. <ul><li>A B </li></ul><ul><li>This is the name for a slanting surface connecting a lower level to a higher level. </li></ul><ul><li>A.) Block and Tackle </li></ul><ul><li>B.) Wedge </li></ul><ul><li>C.) Inclined Plane </li></ul><ul><li>D.) First Class Lever </li></ul><ul><li>C D </li></ul>
  233. 264. <ul><li>A B </li></ul><ul><li>This is the name for two or more simple machines working together. </li></ul><ul><li>A.) Block and Tackle </li></ul><ul><li>B.) Mechanical Advantage </li></ul><ul><li>C.) Law of Motion </li></ul><ul><li>D.) Compound Machine </li></ul><ul><li>C D </li></ul>
  234. 265. <ul><li>A B </li></ul><ul><li>This is the name for two or more simple machines working together. </li></ul><ul><li>A.) Block and Tackle </li></ul><ul><li>B.) Mechanical Advantage </li></ul><ul><li>C.) Law of Motion </li></ul><ul><li>D.) Compound Machine </li></ul><ul><li>C D </li></ul>
  235. 266. <ul><li>Motion and Machines Assessment Due! </li></ul>Copyright © 2010 Ryan P. Murphy

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