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chapter 5

QuestionAnswer
work power transfer of energy that occurs when a force makes an object move
power amount of work done in one second
machine is a device that makes doing work easier
output force force applied by the machine
input force the force that is applied to the machine
efficiency how much work put into a machine is changed into useful output work by the machine
mechanical advantage the ratio of the output force to the input force
simple machine machine that does work with only one movement lever pulley wheel and axle inclined plane screw and wedge
lever simple machine consisting of a bar free to pivot about a fixed point called the fulcrum
pulley simple machine that consists of a grooved wheel with a rope chain or cable running along the groove can be either fixed or movable
wheel and axle simple machine that consists of a shaft or axle attached to the center of a larger wheel so that the shaft and the wheel can rotate together
inclined plane simple machine that consists of a slopin surface such as a ramp that reduces the amount of force needed to lift something by increasing the distance over which the force is applied
screw simple machine that consists of an inclined plane wrapped in a spiral around a cylindrical post
wedge simple machine that is an inclined plane with one or two sloping sides
compound machine machine that is a combination of two or more simple machines
Created by: snbeard
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