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work what is necessary for a force to move an object through a distance; force x distance
power the amount of work done per unit of time (rate at which work is done)
efficiency the ratio between the work done by a machine (output) and the work put into it (input)
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 (output/effort)
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 (such as separating)
work input the product of the input force and the distance a machine moves in the direction of the input force (pg 336)
work output the product of the output force and the distance part of the machine moves in the direction of the output force (pg 336)
first-class lever fulcrum in center, effort on one end, load on other end
second-class lever fulcrum on one end, effort on other end, load in center
third-class lever fulcrum on one end, load on other end, effort in center
Created by: akguidry