{
 "source": "https://peabody.kids/flashcards/phys-simple-machines",
 "id": "phys-simple-machines",
 "title": "Simple Machines",
 "category": "science",
 "subject": "Physics",
 "levels": [
  "3-5",
  "6-8"
 ],
 "description": "The six simple machines, examples and key ideas.",
 "tags": [
  "simple machines",
  "work"
 ],
 "frontLabel": "Question",
 "backLabel": "Answer",
 "cards": [
  [
   "Simple machine",
   "A tool with few or no moving parts that makes work easier"
  ],
  [
   "How many kinds of simple machines are there?",
   "Six"
  ],
  [
   "Name the six simple machines",
   "Lever, wheel and axle, pulley, inclined plane, wedge, screw"
  ],
  [
   "Lever",
   "A bar that rotates around a point called a fulcrum"
  ],
  [
   "Fulcrum",
   "The pivot point of a lever"
  ],
  [
   "Effort",
   "The force you apply to a machine"
  ],
  [
   "Load (resistance)",
   "The weight a machine moves"
  ],
  [
   "First-class lever",
   "Fulcrum is between the effort and the load"
  ],
  [
   "Second-class lever",
   "Load is between the fulcrum and the effort"
  ],
  [
   "Third-class lever",
   "Effort is between the fulcrum and the load"
  ],
  [
   "Example of a first-class lever",
   "A seesaw or a crowbar"
  ],
  [
   "Example of a second-class lever",
   "A wheelbarrow or a nutcracker"
  ],
  [
   "Example of a third-class lever",
   "A fishing rod, a broom or tweezers"
  ],
  [
   "Inclined plane",
   "A flat sloped surface used to raise or lower loads"
  ],
  [
   "Example of an inclined plane",
   "A ramp or a slide"
  ],
  [
   "Wedge",
   "Two inclined planes put together to split or cut things"
  ],
  [
   "Example of a wedge",
   "An axe, knife or doorstop"
  ],
  [
   "Screw",
   "An inclined plane wrapped around a cylinder"
  ],
  [
   "Example of a screw",
   "A jar lid, a bolt or a light bulb base"
  ],
  [
   "Wheel and axle",
   "A wheel joined to a rod so they turn together"
  ],
  [
   "Example of a wheel and axle",
   "A doorknob, a steering wheel or a bicycle wheel"
  ],
  [
   "Pulley",
   "A wheel with a rope or chain that changes the direction of a pull"
  ],
  [
   "Example of a pulley",
   "A flagpole rope, a crane or a window blind"
  ],
  [
   "Fixed pulley",
   "A pulley attached in place; changes the direction of force"
  ],
  [
   "Movable pulley",
   "A pulley that moves with the load; reduces the force needed"
  ],
  [
   "Block and tackle",
   "A system of pulleys that gives a large mechanical advantage"
  ],
  [
   "Mechanical advantage",
   "How many times a machine multiplies your effort"
  ],
  [
   "Do machines reduce the work done?",
   "No; they make work easier by changing force or direction"
  ],
  [
   "What do you give up when you use less force?",
   "You move through a longer distance"
  ],
  [
   "Compound machine",
   "Two or more simple machines working together"
  ],
  [
   "Example of a compound machine",
   "Scissors, a bicycle or a can opener"
  ],
  [
   "Scissors are made of",
   "Levers and wedges"
  ],
  [
   "A longer ramp makes it",
   "Easier to push things up, but you push farther"
  ],
  [
   "Work",
   "Force times distance"
  ],
  [
   "Wheelbarrow",
   "A second-class lever with a wheel and axle"
  ],
  [
   "Pliers",
   "Two levers joined together"
  ],
  [
   "Bottle opener",
   "A second-class lever"
  ],
  [
   "Stairs",
   "A set of inclined planes"
  ],
  [
   "Spiral staircase",
   "A kind of screw shape"
  ],
  [
   "Zipper",
   "A group of tiny wedges"
  ],
  [
   "Chisel",
   "A wedge"
  ],
  [
   "Faucet handle",
   "A wheel and axle"
  ],
  [
   "Gears",
   "Toothed wheels that turn each other"
  ],
  [
   "Ax splitting wood",
   "Uses a wedge to push wood apart"
  ],
  [
   "Drill bit",
   "A screw"
  ],
  [
   "Teeter-totter",
   "A first-class lever"
  ],
  [
   "Baseball bat",
   "A third-class lever"
  ],
  [
   "Hammer pulling a nail",
   "A first-class lever"
  ],
  [
   "Why is a longer lever arm helpful?",
   "Less effort force is needed to lift the load"
  ],
  [
   "Archimedes' famous line about levers",
   "Give me a place to stand and I will move the Earth"
  ]
 ]
}