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Chapter 5 vocab Arty

Section 1,2, and 3

QuestionAnswer
work transfer of energy that occurs when a force makes an object move; measured in joules.
power amount of work done, or the amount of energy transferred, divided by the time required to do the work or transfer the energy; measured in watts
machine device that makes doing work easier y increasing the force applied to an object, changing the direction of an applied force, or increasing the distance over which a force can be applied
input force
output force
mechanical advantage ratio of the output force exerted by a machine to the input force applied to the machine
efficiency ratio of the output work done by the expressed as a percentage
simple machine machine that does work with only on 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 rotate together
inclined plane simple machine that consists of a sloping 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 consist of an inclined plane wrapped in a spiral around a cylindrical post
wedge simple machine that is an inclined plan with one or two sloping sides
compound machine machine that is a combination of two or more simple machines
Created by: arty
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