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Work and Power Vocab

chapter 8 vocabulary

WordDefinition
work when a force causes an object to move in the same direction of that force
joule unit used to express energy
power rate energy is being transferred
watt unit to express power
machine device that makes work easier by changing size or direction of the force
work input work done on a machine
work output work done by a machine
machanical advantage number that tells how many times a machine multiplies a force
mechanical efficiency comparison of work input and output
lever bar that pivots on a fulcrum
pulley simple machine, has a grooved wheel that holds a rope or cable
wheel and axel 2 circular objects of different sizes, the wheel is the larger of the two
inclined plane straight slanted surface
wedge pair of inclined planes that move
screw inclined plane wrapped around a cylinder
compound machine made up with more that one simple machine
Created by: jlindsay
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