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science chapter 2 mc

science vocabulary and definitions for chapter 2

work force x distance
machine a device that changes the amount of a force applied to an object, the direction of th force, or both
lever a simple machine having an arm that moves around 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 force on
resistance arm the part of a lever that applies a force on an object
pulley a wheel that has a groove along its edge
wheel and axle a simple machine that has a central pivet around which a wheel moves
inclined plane a flat sloping surface
wedge a simple machine made up of two or more inclined planes
screw an inclined plane wrapped around a cone or cylinder
compound machine a device that is made up of two or more simple machines
efficiency the ratio of the work that comes out of a machine, to the work being put into a machine
Created by: elliegrace