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Study
Term 3 All about structures and machines
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If we join two inclined planes we get a...
wedge.
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Tell me one example of a class 3 lever.
a broom, stapler, fishing rod, etc.
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Tell me 1 example of a class 2 lever.
wheelbarrow, tweezers, bottle opener, etc.
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The screw is..
an inclined plane wrapped around a cylinder.
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When a ramp is less steep do we need more or less force?
less force but the ramp is longer.
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Pulleys help us....
lift heavy objects more easily.
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Force is...
push or a pull on an object
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Steep means...
very inclined
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Are levers simple or complex machines?
simple machines
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Tell me one example of a class 1 lever.
pliers, scale, pin, clip, etc.
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An inclined plane...
lets us move objects using less force.
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Gears are...
several cogs that are connected.
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The 3 parts of a lever are..
force, pivot and load.
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When we turn one cog it transmits movement to the other cog thanks to..
the chain
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A crank is
a bent level that transmits its movement to an axle.
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When the cog turns, the _____ moves in a straight line.
rack
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Which shape makes for a very strong structure?
A triangle
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What is a structure?
A group of elements that can support weight or load and project objects
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Rigid means
not flexible
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Most structures have which 3 elements?
girders, pillars, and a load
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What are mechanical components?
Simple machines that transmit movement.
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