Simple Machines

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Simple Machines

• By Rebecca

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What Simple Machines Do

• Simple machines are used to make work easier.
• Work scientifically means to move something.
  Simple machines make it easier to move things.

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Examples of Simple Machines

• There are are only 6 types of simple machines.
• They are a pulley, lever, wheel and axle,
  wedge, screw, and inclined plane.

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Parts of a Lever

• There are four different parts of a lever.
• There is a fulcrum, effort force, load or
  resistance, and the lever arm.
• All of these parts put together makes a lever.

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How to Set up a Lever

• The best way to set up a lever is to put the load
  or resistance closer to the fulcrum.
• Then put your hand as far away as possible.

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Parts of a Pulley

• The parts of a pulley are the load or
  resistance, pulley wheel, effort force, and rope
  or line.

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Supporting Lines Affect Your Effort Force

• Supporting lines make work easier.
• We ran a test one time in class and have proven
  that the more supporting lines you have, the less
  effort force you have to use.
• For example, say you have five supporting lines
  the supporting lines cut your effort force into
  1/5 of the force would have needed to move it
  cave man style.

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How Supporting Lines Affect the Distance Your
Hand and Load Moves

• The supporting lines make it so your hand moves
  more than the load.
• Example You have three supporting lines and your
  hand should move 3x as far as the load.

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Definitions

• Simple Machines A simple machine is used to make
  work easier.
• Load/ Resistance The weight that you have to
  lift or move.
• Work Work means to move something.
• Effort Force The force you use to move something.