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Work and Simple Machines
What is work? ,[object Object],[object Object]
Work or Not? ,[object Object],[object Object],[object Object]
Work or Not? ,[object Object],[object Object],[object Object]
 
What’s work? ,[object Object],[object Object],[object Object],[object Object],[object Object]
What’s work? ,[object Object],[object Object],[object Object],[object Object],[object Object]
Formula for work ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
W=FD ,[object Object],[object Object]
W=FD ,[object Object],[object Object],[object Object]
Power ,[object Object],[object Object],[object Object],[object Object]
Check for Understanding ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
History of Work ,[object Object]
Simple Machines ,[object Object]
Simple Machines ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Simple Machines ,[object Object],[object Object],[object Object],[object Object],[object Object]
Mechanical Advantage ,[object Object],[object Object]
Mechanical Advantage ,[object Object],[object Object],[object Object],[object Object]
[object Object]
The Lever ,[object Object],[object Object],[object Object]
The 3 Classes of Levers ,[object Object]
 
To find the MA of a lever, divide the output force by the input force, or divide the length of the resistance arm by the length of the effort arm.
First Class Lever ,[object Object],[object Object],[object Object]
Fulcrum is between EF (effort) and RF (load) Effort moves farther than Resistance.   Multiplies EF and changes its direction
Second Class Lever ,[object Object],[object Object],[object Object]
RF (load) is between fulcrum and EF  Effort moves farther than Resistance.   Multiplies EF, but does not change its direction
Third Class Lever ,[object Object],[object Object],[object Object]
EF is between fulcrum and RF (load)  Does not multiply force  Resistance moves farther than Effort.   Multiplies the distance the effort force travels
Wheel and Axle ,[object Object],[object Object]
Pulley ,[object Object],[object Object],[object Object],[object Object],[object Object]
Inclined Plane ,[object Object]
Inclined Plane ,[object Object],[object Object]
Although it takes less force for car A to get to the top of the ramp,  all the cars do the same amount of work. A  B  C
Inclined Plane ,[object Object],[object Object]
Wedge ,[object Object],[object Object]
Screw ,[object Object],[object Object]
MA of an screw can be calculated by dividing the number of turns per inch.
 
Efficiency ,[object Object],[object Object],[object Object],[object Object],[object Object]
Practice Questions ,[object Object],[object Object],[object Object]
Practice Questions ,[object Object],[object Object],[object Object]
Practice Questions ,[object Object],[object Object],[object Object]
Practice Questions ,[object Object],[object Object],[object Object]

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Work and Simple Machines Explained

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  • 26. To find the MA of a lever, divide the output force by the input force, or divide the length of the resistance arm by the length of the effort arm.
  • 27.
  • 28. Fulcrum is between EF (effort) and RF (load) Effort moves farther than Resistance. Multiplies EF and changes its direction
  • 29.
  • 30. RF (load) is between fulcrum and EF Effort moves farther than Resistance. Multiplies EF, but does not change its direction
  • 31.
  • 32. EF is between fulcrum and RF (load) Does not multiply force Resistance moves farther than Effort. Multiplies the distance the effort force travels
  • 33.
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  • 37. Although it takes less force for car A to get to the top of the ramp, all the cars do the same amount of work. A B C
  • 38.
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  • 41. MA of an screw can be calculated by dividing the number of turns per inch.
  • 42.  
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