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6.7 Mrs Jensen
Work and Simple Machines
15
Science
6th Grade
09/12/2011

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Cards

Term
work

6.7
Definition
occurs when a force produces movement parallel to the direction in which the force is applies (measured in joules)
Term
power

6.7
Definition
measures the rate at which work is done in a certain period of time (measured in watts)
Term
simple machine

6.7
Definition
a machine that works with only one motion -- an inclined plane, wedge, screw, lever, wheel and axle, and pulley
Term
compound machine

6.7
Definition
a combination of two or more simple machines
Term
effort force

6.7
Definition
a force applied to a machine
Term
resistance force

6.7
Definition
the force a machine must overcome
Term
mechanical advantage

6.7
Definition
a comparison of the effort force to the resistance force for a machine
Term
inclined plane

6.7
Definition
a simple machine that is a sloped surface, or ramp
Term
wedge

6.7
Definition
a moving inclined plane with one or two sloping sides
Term
screw

6.7
Definition
an inclined plane wrapped around a shaft
Term
lever

6.7
Definition
a simple machine made from a rod or plank that pivots about a point
Term
fulcrum

6.7
Definition
the point about which a lever pivots
Term
wheel and axle

6.7
Definition
a simple machine made from two rigidly attached wheels that rotate together
Term
pulley

6.7
Definition
a simple machine that allows you to pull down to lift a weight
Term
efficiency

6.7
Definition
the ability of a machine to convert work input to work output
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