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[object Object],[object Object]
Pulleys, Wheel and axle and Gears April 20, 2009
Objectives ,[object Object],[object Object],[object Object]
Pulleys ,[object Object],[object Object]
MA of a Pulley ,[object Object],MA = 2 Two lines are supporting the load.   MA = 1 One line is supporting the load.
[object Object],Fixed compound moveable
Fixed Pulleys ,[object Object]
[object Object],mechanical advantage of 1
Moveable Pulley The load is  supported by 2 rope arms under the pulley . You must pull 2 times the distance to lift the load.
The effort arm will always be twice the length of the resistance arm so the mechanical advantage of a single moveable pulley is 2.
Compound Pulley ,[object Object],Allows the user to gain both Mechanical and Directional Advantage. The more rope arms supporting the load the greater the Mechanical Advantage.
 
Block and tackle ,[object Object]
 
The Wheel and Axle ,[object Object],[object Object]
Wheel & Axle M.A. ,[object Object],[object Object],Example:  10 in   = 5   2 in
Gears ,[object Object]

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2009 Pulleys

  • 1.
  • 2. Pulleys, Wheel and axle and Gears April 20, 2009
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9. Moveable Pulley The load is supported by 2 rope arms under the pulley . You must pull 2 times the distance to lift the load.
  • 10. The effort arm will always be twice the length of the resistance arm so the mechanical advantage of a single moveable pulley is 2.
  • 11.
  • 12.  
  • 13.
  • 14.  
  • 15.
  • 16.
  • 17.