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Simple Machines. Make work easier!. What are Simple machines?. A simple machine is an unpowered mechanical device There are six basic types of simple machines: inclined plane wedge screw lever wheel and axle pulley. Inclined plane. Description: a flat, slanted surface

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simple machines

Simple Machines

Make work easier!

what are simple machines
What are Simple machines?
  • A simple machineis an unpowered mechanical device
  • Thereare six basic types of simple machines:
  • inclined plane
  • wedge
  • screw
  • lever
  • wheel and axle
  • pulley
inclined plane
Inclined plane
  • Description:
      • a flat, slanted surface
  • How they make work easier:
      • Increases the distance (small force over long distance)
      • Longer the incline plane, the greater mechanical advantage (easier it is to push or pull)
wedge
Wedge
  • Description:
      • thick at one end and thin at the other end (2 incline planes put together)
      • Splits things apart
  • How it makes work easier:
      • Increases the distance (small force over long distance)
      • Longer and thinner the wedge, the greater the mechanical advantage (the easier it is to split things)
screws
Screws
  • Description:
      • an inclined plane wrapped around a center, forming a spiral.
  • How it makes work easier:
      • Increases the distance (small force over long distance)
      • Closer together the threads (spiral) the greater the mechanical advantage (the easier it is to pull together)
wheels and axles
Wheels and axles
  • Description:
    • Two circular objects that are connected together and rotate on an axis.
    • The large object is called the wheel.
    • The small object (stick) is called the axle.
  • How it makes work easier:
    • Increases your force
    • Bigger the wheel, the greater the mechanical advantage (the easier it is to turn)

wheel

Axle

pulleys
Pulleys
  • Description:
    • a rope that is wrapped around a grooved wheel.
  • How it makes work easier:
    • changes the direction
    • Increases force
    • The more ropes a pulley has, the greater the mechanical advantage (the easier it is to lift things up)
levers
Levers
  • Description:
    • a rigid bar that rotates on a fixed point called the fulcrum
    • Different Classes:
      • 1stclass: fulcrum is in middle
      • 2nd class: resistance (output) in middle
      • 3rdclass: effort (input) in middle
  • How it makes work easier:
    • 1st: changes directions
    • 2nd: increases the distance
    • 3rd: increases force

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