Simple machines are tools that make tasks easier.
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Simple machines are tools that make tasks easier.
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All machines are built using one or more simple machines.
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Simple machines have very few parts.There are 6 types of simple machines:
pulleylever
wheel and axleinclined plane
wedgescrew
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1. pulley• moves heavy objects up and down or across.
• the more pulleys in the system, the less force needed.
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Here are some examples of pulleys.
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Can you think of other examples of pulleys?
A pulley that raises and lowers blinds.
The pulley that raises and lowers the flag on a flagpole.
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2. lever• is a stiff bar that rests on a support called a fulcrum which lifts or
moves loads.
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Here are some examples of levers.
bottle opener seesaw
toilet flusher
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Can you think of other examples of levers?
crowbarscissors
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3. wheel and axle
• Is a wheel with a rod, called an axle, that lifts or moves loads
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Here are some examples of wheel and axles.
rolling pin pencil sharpener
ferris wheel
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Can you think of other examples of wheel and axels?
bicycle
skates
wagon
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4. inclined plane
• is a slanted surface that can be used to raise or lower things.
• does not move.
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These are some examples of inclined planes.
wheelchair rampboatramp
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Can you think of other examples of inclined planes?
dump truck ladder rollercoaster
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5. wedge
• Is 2 inclined planes back to back• a wedge moves; inclined plane doesn’t.• Wedges hold things together or split things
apart.
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These are some examples of wedges.
screwdriver
nail
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6. screw
• The head of the screw is used to turn or drive the screw into something else.
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These are some examples of screws.
swivel stool
bottle lids
corkscrew
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Can you think of other examples of screws?
door lock
light bulb
clamp
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As you can see, our world is made up of many simple machines. You can find examples any place you
look.
• Simple machines solve the problem of how to do work faster and easier.
• Maybe you can invent a machine that will make some job faster and easier.
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1. Do post CFA 6.8 *anytime you see “force” or “work” as an answer option, choose “force” (as in #2)2. Turn in to me3. Do “edheads” activity4. turn in when finished