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Simple Machines
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What is it?
wheels
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What is it?
lever, bottle opener
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What is it?
pulley
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What is it?
crowbar
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What is it?
wheelbarrow
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What is it?
ramp; inclined plane
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What is it?
axle; wheels; skateboard
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What is it?
inclined plane; slide
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What is it?
wedge
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What is it?
screw
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