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9Sci CH 7

Machines

QuestionAnswer
bionics designing replacement body parts
compound machine combination of two or more simple machines
efficiency ratio of useful work put out by a machine; always less than 100%
effort arm part of a lever where effort force is applied
fulcrum the fixed part where a lever pivots
ideal machine machine that works 100% efficient; workout equals work in
inclined place machine containing a slope surface
lever machine of a bar with a pivot
machine device that makes work easier
mechanical advantage number of times a machine multiplies
power measure of work done in a certain time
pulley machine with a groove wheel and rope running along
resistance arm a part of a lever where force is applied
resistance force force exerted by a machine to overcome resistance to gravity or friction
screw machine on an inclined plane wrapped around a post cylinder
simple machine device that does work in one movement
wedge machine with inclined plane and has one or two slopes
wheel and axle machine with two different sized wheels that rotate
Created by: hockettd