Simple Machines    SOL 3.2
Machine – a tool that helps us do               workMachines help us by:3. Changing the amount of force on an   object.5. ...
Force is a push or pull thatchanges the motion or shape        of an object.   Example: I push a bookshelf to             ...
Energy is the ability to do      work.Example: I must have energy to        run the mile.
Work is the result of force   moving an object.Example – Picking up something     heavy is hard work!
GravityGravity is the force that constantly   pulls objects toward Earth.
Simple machines – have few or               no moving parts•   Lever•   Inclined Plane•   Wedge•   Screw•   Wheel and Axel...
Lever –made of a board or barset on top of a fulcrum. It is used           to lift weight     Example: seesaw, crowbar,   ...
Inclined Plan – a slantedsurface to make lifting easier      Example: ramp, stairs
Wedge – two inclined planestogether used to raise an object     or split an object.  Example: knife, door wedge, ax
Screw – an inclined planewrapped around a pole or shaft that is used to hold materials   together or drill holes.     Exam...
Wheel and Axel – a wheel thatturns on a post to help move  things quickly and easily    Example: steering wheel,     doork...
Pulley – made of rope and stringwound around a reel to change    the direction of a force.   Example : flagpole, clothesli...
Compound Machine – two or moresimple machines working together.Examples:BikeCar
How Work is DoneEnergy     Force    Function         Work is done!
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Simple machines

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Simple machines

  1. 1. Simple Machines SOL 3.2
  2. 2. Machine – a tool that helps us do workMachines help us by:3. Changing the amount of force on an object.5. Changing the direction of the force.
  3. 3. Force is a push or pull thatchanges the motion or shape of an object. Example: I push a bookshelf to move it.
  4. 4. Energy is the ability to do work.Example: I must have energy to run the mile.
  5. 5. Work is the result of force moving an object.Example – Picking up something heavy is hard work!
  6. 6. GravityGravity is the force that constantly pulls objects toward Earth.
  7. 7. Simple machines – have few or no moving parts• Lever• Inclined Plane• Wedge• Screw• Wheel and Axel• Pulley
  8. 8. Lever –made of a board or barset on top of a fulcrum. It is used to lift weight Example: seesaw, crowbar, baseball bat, rake
  9. 9. Inclined Plan – a slantedsurface to make lifting easier Example: ramp, stairs
  10. 10. Wedge – two inclined planestogether used to raise an object or split an object. Example: knife, door wedge, ax
  11. 11. Screw – an inclined planewrapped around a pole or shaft that is used to hold materials together or drill holes. Example: drill bit, screws
  12. 12. Wheel and Axel – a wheel thatturns on a post to help move things quickly and easily Example: steering wheel, doorknob, screwdriver
  13. 13. Pulley – made of rope and stringwound around a reel to change the direction of a force. Example : flagpole, clothesline, cranes, fishing reel
  14. 14. Compound Machine – two or moresimple machines working together.Examples:BikeCar
  15. 15. How Work is DoneEnergy Force Function Work is done!
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