Making WORK easier!

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• Making WORK easier!

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Types of Simple Machines
Inclined Plane
Pulley

• Lever

Wheel and axle
Screw
Wedge
Big Bang Theory clip
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Ideal Mechanical Advantage - Pulley
I.M.A. number of rope sections pulling upwards
IMA 1
IMA 2
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IMA 1 Changes direction of force so the work
is easier (you are now working with gravity
instead of against it)
IMA 2 Multiplies the force by 2 so that you
can lift something twice as heavy as you pull.
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Single Fixed Pulley
Movable Pulley
IMA 2
IMA 1
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What is the IMA of the following pulley system?

1. 1
2. 2
3. 3
4. 4

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What is the IMA of the following pulley system?

1. 1
2. 2
3. 3
4. 4
5. 5

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Inclined plane
Wout Frdr
Win Fede
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Ideal Mechanical Advantage - Inclined Plane
Big Bang Theory clip

• IMA L
• h

L
h
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Wheel and axle
I.M.A. radius of wheel radius of axle
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Wedge

• Two sloping sides changes direction of the force

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Screw

• A wedge with an inclined plane wrapped around it
• More turns higher mechanical advantage

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Frayer Model

• Examples Non-examples
• Essential Non-essential
• Characteristics
  Characteristics

See-saw
Wheelbarrow
Crowbar
Rake
1st class levers
Effort force, Resistance force, and fulcrum
present.
Mechanical advantage is one or more.
Makes work easier by multiplying the force.
Fulcrum is between effort force and resistance
force.
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Frayer Model

• Examples Non-examples
• Essential Non-essential
• Characteristics
  Characteristics

Inclined Planes
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Works Cited

• http//www.uen.org/utahlink/activities/uploads/652
  8_a_screw.jpg
• http//www.beth.k12.pa.us/schools/wwwclass/mcosgro
  ve/simplemachines.gif
• http//www.school-for-champions.com/science/images
  /machines4.gif
• http//www.ent.ohiou.edu/bobw/html/HapEd/NASA/Sim
  pMach/cl2lever.gif
• http//library.thinkquest.org
• http//www.the-office.com/summerlift/pulley1.gif
• http//encyclozine.com/Science/Physics/Machines/in
  cline.gif
• http//www.fi.edu/pieces/knox/automaton/images/the
  wedge.gif
• http//www.worsleyschool.net/science/files/wheel/d
  iagram1.gif
• http//www.metro-region.org/imageRepository/ACFQWB
  8ebaLm.gif
• http//www.ccohs.ca/images/MMH136.gif
• http//www.dynamicscience.com.au/tester/solutions/
  hydraulicus/animatedfourpulley.gif
• http//juniorengineering.usu.edu
• http//www.technologystudent.com/images3/lpulle23.
  gif
• http//www.sciencebuddies.org/mentoring/project_id
  eas/ApMech_img007.jpg
• http//www.gutenberg.org/files/16593/16593-h/image
  s/image_110.jpg
• http//discover.edventures.com/images/termlib/s/sc
  rew/support.gif
• http//selland.boisestate.edu/jbrennan/physics/ima
  ges/
• http//members.aol.com/crummybut/splittingwood.jpg