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Unit 6 6th Grade

Work, Power, and Simple Machines

QuestionAnswer
work what is necessary for a force to move an object through a distance; work is calculated by multiplying the force applied to an object by the distance the object moves
power the amount of work done per unit of time
efficiency the ratio between the work done by a machine and the work put into it
simple machine a device with few, if any, moving parts that makes it easier to do work
mechanical advantage the number of times a simple machine multiplies an effort force
lever a simple machine consisting of a bar and pivot point
fulcrum the pivot point of a lever
wheel and axle a simple machine that consists of a wheel that applies an effort force and a smaller axle that produces an output force
pulley a grooved wheel that turns by the action of a rope in the groove
inclined plane a straight, slanted surface that can multiply an effort force
screw a simple machine made of an inclined plane wrapped around a central bar that can multiply an effort force
wedge an inclined plane that changes the direction of an applied force
Created by: SSmith01