Making it easier for civil society to work with the state Progress
Making WORK easier!
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Transcript of Making WORK easier!
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Making WORK easier!Making WORK easier!
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Types of Simple MachinesTypes of Simple Machines
LeverLever
ScrewScrewWedgeWedge
Inclined PlaneInclined PlanePulleyPulley
Wheel and Wheel and axleaxle
Big Bang Theory clip
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Ideal Mechanical Advantage - PulleyIdeal Mechanical Advantage - Pulley
I.M.A. = I.M.A. = number of rope sections number of rope sections pulling upwardspulling upwards
IMA = 1IMA = 1 IMA = 2IMA = 2
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IMA = 1IMA = 1
Changes directionChanges direction of force so of force so the work is easier (you are the work is easier (you are now working with gravity now working with gravity instead of against it)instead of against it)
IMA = 2IMA = 2
MultipliesMultiplies the force the force by 2 so that you can by 2 so that you can lift something twice lift something twice as heavy as you pull.as heavy as you pull.
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Single Fixed Single Fixed PulleyPulley
Movable PulleyMovable Pulley
IMA = 1IMA = 1
IMA = 2IMA = 2
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What is the IMA of the following What is the IMA of the following pulley system?pulley system?
1 2 3 4
25% 25%25%25%
1.1. 11
2.2. 22
3.3. 33
4.4. 44
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What is the IMA of the following What is the IMA of the following pulley system?pulley system?
1 2 3 4 5
20% 20% 20%20%20%
1.1. 11
2.2. 22
3.3. 33
4.4. 44
5.5. 55
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Inclined planeInclined plane
FFrrFe
WWoutout = = FFrr··ddrr
WWinin = = FFee··ddee
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Ideal Mechanical Advantage - Ideal Mechanical Advantage - Inclined PlaneInclined Plane
IMA = LIMA = L
hhLL
hh
Big Bang Theory clip
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Wheel and axleWheel and axle
I.M.A. = I.M.A. = radius of wheelradius of wheel
radius of axleradius of axle
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WedgeWedge
Two sloping sides – changes direction of Two sloping sides – changes direction of the forcethe force
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ScrewScrew
A wedge with an inclined plane wrapped A wedge with an inclined plane wrapped around itaround it
More turns = higher mechanical More turns = higher mechanical advantageadvantage
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Frayer ModelFrayer ModelExamples:Examples: Non-examples: Non-examples:
Essential Essential Non-essential Non-essential
Characteristics: Characteristics:Characteristics: Characteristics:
11stst class levers class levers
See-sawSee-saw
CrowbarCrowbarWheelbarrowWheelbarrow
RakeRake
Effort force, Resistance Effort force, Resistance force, and fulcrum present.force, and fulcrum present.
Fulcrum is between effort Fulcrum is between effort force and resistance force.force and resistance force.
Mechanical advantage is Mechanical advantage is one or more.one or more.Makes work easier by Makes work easier by multiplying the force.multiplying the force.
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Frayer ModelFrayer ModelExamples:Examples: Non-examples: Non-examples:
Essential Essential Non-essential Non-essential
Characteristics: Characteristics:Characteristics: Characteristics:
Inclined PlanesInclined Planes
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Works CitedWorks Citedhttp://www.uen.org/utahlink/activities/uploads/6528_a_screw.jpghttp://www.beth.k12.pa.us/schools/wwwclass/mcosgrove/simplemachines.gifhttp://www.school-for-champions.com/science/images/machines4.gifhttp://www.ent.ohiou.edu/~bobw/html/HapEd/NASA/SimpMach/cl2lever.gifhttp://library.thinkquest.orghttp://www.the-office.com/summerlift/pulley1.gifhttp://encyclozine.com/Science/Physics/Machines/incline.gifhttp://www.fi.edu/pieces/knox/automaton/images/thewedge.gifhttp://www.worsleyschool.net/science/files/wheel/diagram1.gifhttp://www.metro-region.org/imageRepository/ACFQWB8ebaLm.gifhttp://www.ccohs.ca/images/MMH136.gifhttp://www.dynamicscience.com.au/tester/solutions/hydraulicus/animatedfourpulley.gifhttp://juniorengineering.usu.eduhttp://www.technologystudent.com/images3/lpulle23.gifhttp://www.technologystudent.com/images3/lpulle23.gifhttp://www.sciencebuddies.org/mentoring/project_ideas/ApMech_img007.jpghttp://www.sciencebuddies.org/mentoring/project_ideas/ApMech_img007.jpghttp://www.gutenberg.org/files/16593/16593-h/images/image_110.jpghttp://www.gutenberg.org/files/16593/16593-h/images/image_110.jpghttp://discover.edventures.com/images/termlib/s/screw/support.gifhttp://discover.edventures.com/images/termlib/s/screw/support.gifhttp://selland.boisestate.edu/jbrennan/physics/images/http://selland.boisestate.edu/jbrennan/physics/images/http://members.aol.com/crummybut/splittingwood.jpghttp://members.aol.com/crummybut/splittingwood.jpg