# lever* # plane* # screw # wedg *=in phone
a lever is in a telphone
He invented the Telephone
a compound machine is a combination of simple machines
lever
It is a lever
a lever
Simple machines increase mechanical advantage.
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a compound machine is a combination of simple machines
pulley
A lever
what kind of simple machine involves the rake
force
it is a lever
It is a wedge.
lever
It is a lever
a compound machine
a lever