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Machines
Simple Machines- 7th Grade
14
Science
7th Grade
10/10/2013

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Cards

Term
machine
Definition
device that makes work easier
Term
wheel and axle
Definition
two different-sized wheels that turn together and around the same point
Term
exert force
Definition
force applied to a machine
Term
resistance force
Definition
force that opposes the effort force
Term
mechanical advantage
Definition
number of times a machine multiplies the effort force
Term
ideal mechanical advantage
Definition
mechanical advantage a machine would have with no friction
Term
work output
Definition
work done by a machine
Term
work input
Definition
work done on a machine
Term
efficiency
Definition
ratio of work output to work input
Term
lever
Definition
bar that is free to turn around a fixed point
Term
fulcrum
Definition
fixed point around which a lever pivots or turns
Term
pulley
Definition
rope wrapped around a wheel
Term
inclined plane
Definition
slanted surface, or temp
Term
compound machine
Definition
machine that combines two simple machines or more
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