Lilys Science Slideshow

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Lilys Science Slideshow

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Simple Machines

• Lever, Pulley, Wheel and Axel, Screw, Wedge,
  Inclined Plane.

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What Simple Machines Do

• Simple Machines make work easier. We move more
  than the load using less effort force.

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Definitions

• Simple machines- a machine that makes work easier
• Load or Resistance- the objects that the lever is
  lifting
• Effort Force- the thing that is pushing the load
  up
• Work - when you actually move something

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Lever Parts

• Lever Arm, Fulcrum, Resistance or Load, and
  Effort Force.

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The Best Way to Set Up a Lever

• The best way to set up a lever so that the effort
  force is the least possible is to put the load
  closest to the fulcrum, and your hand on the edge
  of the lever arm.

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Pulley Parts

• The pulley wheel, effort force, supporting lines,
  and the load are all pulley parts.

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How Supporting Lines Affect Effort Force

• Supporting lines affect effort force by
  multiplying the effort force by how many
  supporting lines there are.

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How Supporting Lines Affect the Distance Your
Hands Move Compared to the Load

• The more supporting lines, the more your hand
  moves compared to the weight.

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