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Science CH 14 vocab
vocab
14
Science
8th Grade
12/06/2012

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Term
done when a force exerted on an object causes that object to move some distance
Definition
work
Term
rate at which work is done
Definition
power
Term
force exerted on a machine
Definition
input force
Term
force exerted by a machine
Definition
output force
Term
number of times the input force is multiplied by a machine
Definition
mechanical advantage
Term
equals the output work divided by the input work
Definition
efficiency
Term
a machine that does work with only one movement
Definition
simple machine
Term
machine made up of a combination of two or more simple machines
Definition
compound machines
Term
siple machine that is a flat surface, sloped surface, or ramp
Definition
inclined plane
Term
simple machine that is an inclined plane wrapped around a cylinder or post
Definition
screw
Term
simple machine consisting of a rigid rod that pivots about a fized point called the fulcrum
Definition
lever
Term
simple machine made from two circular objects of different sizeds that are attatched and rotate together
Definition
wheel and axle
Term
simple machine made from a grooved wheel with a rope or cable wrapped around the groove
Definition
pulley
Term
SM-consisting of an inclined plane that moves
Definition
wedge
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