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UnitF Chapter2

work the result when a force causes an object to move
machine a device that changes the amount of a force applied to an object to the direction of a force or both
lever a simple machine having an arm that moves about a fixed point
fulcrum the fixed point on a lever
effort arm the part of a lever on which a person or another machine applies a force
resistance arm the part of a lever that applies a force on a object
pulley a wheel that has a groove along its edge
wheel and axle a simple machone that has a centeral pivot around which a wheel moves
inclined plane a flat sloping surface
wedge a simple machine composed of one or two inclined planes
screw an inclined plane wrapped around a cylinder or cone
compound machine a device that is made up of one or two more simple machines
efficiency the ratio of the work that comes out of a machine to the work put into that machine
Created by: EleanorR99